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Merge android-4.4.133 (3f51ea2) into msm-4.4

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* refs/heads/tmp-3f51ea2
  Linux 4.4.133
  x86/kexec: Avoid double free_page() upon do_kexec_load() failure
  hfsplus: stop workqueue when fill_super() failed
  cfg80211: limit wiphy names to 128 bytes
  gpio: rcar: Add Runtime PM handling for interrupts
  time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting
  dmaengine: ensure dmaengine helpers check valid callback
  scsi: zfcp: fix infinite iteration on ERP ready list
  scsi: sg: allocate with __GFP_ZERO in sg_build_indirect()
  scsi: libsas: defer ata device eh commands to libata
  s390: use expoline thunks in the BPF JIT
  s390: extend expoline to BC instructions
  s390: move spectre sysfs attribute code
  s390/kernel: use expoline for indirect branches
  s390/lib: use expoline for indirect branches
  s390: move expoline assembler macros to a header
  s390: add assembler macros for CPU alternatives
  ext2: fix a block leak
  tcp: purge write queue in tcp_connect_init()
  sock_diag: fix use-after-free read in __sk_free
  packet: in packet_snd start writing at link layer allocation
  net: test tailroom before appending to linear skb
  btrfs: fix reading stale metadata blocks after degraded raid1 mounts
  btrfs: fix crash when trying to resume balance without the resume flag
  Btrfs: fix xattr loss after power failure
  ARM: 8772/1: kprobes: Prohibit kprobes on get_user functions
  ARM: 8770/1: kprobes: Prohibit probing on optimized_callback
  ARM: 8769/1: kprobes: Fix to use get_kprobe_ctlblk after irq-disabed
  tick/broadcast: Use for_each_cpu() specially on UP kernels
  ARM: 8771/1: kprobes: Prohibit kprobes on do_undefinstr
  efi: Avoid potential crashes, fix the 'struct efi_pci_io_protocol_32' definition for mixed mode
  s390: remove indirect branch from do_softirq_own_stack
  s390/qdio: don't release memory in qdio_setup_irq()
  s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero
  s390/qdio: fix access to uninitialized qdio_q fields
  mm: don't allow deferred pages with NEED_PER_CPU_KM
  powerpc/powernv: Fix NVRAM sleep in invalid context when crashing
  procfs: fix pthread cross-thread naming if !PR_DUMPABLE
  proc read mm's {arg,env}_{start,end} with mmap semaphore taken.
  tracing/x86/xen: Remove zero data size trace events trace_xen_mmu_flush_tlb{_all}
  cpufreq: intel_pstate: Enable HWP by default
  signals: avoid unnecessary taking of sighand->siglock
  mm: filemap: avoid unnecessary calls to lock_page when waiting for IO to complete during a read
  mm: filemap: remove redundant code in do_read_cache_page
  proc: meminfo: estimate available memory more conservatively
  vmscan: do not force-scan file lru if its absolute size is small
  powerpc: Don't preempt_disable() in show_cpuinfo()
  cpuidle: coupled: remove unused define cpuidle_coupled_lock
  powerpc/powernv: remove FW_FEATURE_OPALv3 and just use FW_FEATURE_OPAL
  powerpc/powernv: Remove OPALv2 firmware define and references
  powerpc/powernv: panic() on OPAL < V3
  spi: pxa2xx: Allow 64-bit DMA
  ALSA: control: fix a redundant-copy issue
  ALSA: hda: Add Lenovo C50 All in one to the power_save blacklist
  ALSA: usb: mixer: volume quirk for CM102-A+/102S+
  usbip: usbip_host: fix bad unlock balance during stub_probe()
  usbip: usbip_host: fix NULL-ptr deref and use-after-free errors
  usbip: usbip_host: run rebind from exit when module is removed
  usbip: usbip_host: delete device from busid_table after rebind
  usbip: usbip_host: refine probe and disconnect debug msgs to be useful
  kernel/exit.c: avoid undefined behaviour when calling wait4()
  futex: futex_wake_op, fix sign_extend32 sign bits
  pipe: cap initial pipe capacity according to pipe-max-size limit
  l2tp: revert "l2tp: fix missing print session offset info"
  Revert "ARM: dts: imx6qdl-wandboard: Fix audio channel swap"
  lockd: lost rollback of set_grace_period() in lockd_down_net()
  xfrm: fix xfrm_do_migrate() with AEAD e.g(AES-GCM)
  futex: Remove duplicated code and fix undefined behaviour
  futex: Remove unnecessary warning from get_futex_key
  arm64: Add work around for Arm Cortex-A55 Erratum 1024718
  arm64: introduce mov_q macro to move a constant into a 64-bit register
  audit: move calcs after alloc and check when logging set loginuid
  ALSA: timer: Call notifier in the same spinlock
  sctp: delay the authentication for the duplicated cookie-echo chunk
  sctp: fix the issue that the cookie-ack with auth can't get processed
  tcp: ignore Fast Open on repair mode
  bonding: do not allow rlb updates to invalid mac
  tg3: Fix vunmap() BUG_ON() triggered from tg3_free_consistent().
  sctp: use the old asoc when making the cookie-ack chunk in dupcook_d
  sctp: handle two v4 addrs comparison in sctp_inet6_cmp_addr
  r8169: fix powering up RTL8168h
  qmi_wwan: do not steal interfaces from class drivers
  openvswitch: Don't swap table in nlattr_set() after OVS_ATTR_NESTED is found
  net: support compat 64-bit time in {s,g}etsockopt
  net_sched: fq: take care of throttled flows before reuse
  net/mlx4_en: Verify coalescing parameters are in range
  net: ethernet: sun: niu set correct packet size in skb
  llc: better deal with too small mtu
  ipv4: fix memory leaks in udp_sendmsg, ping_v4_sendmsg
  dccp: fix tasklet usage
  bridge: check iface upper dev when setting master via ioctl
  8139too: Use disable_irq_nosync() in rtl8139_poll_controller()
  BACKPORT, FROMLIST: fscrypt: add Speck128/256 support
  cgroup: Disable IRQs while holding css_set_lock
  Revert "cgroup: Disable IRQs while holding css_set_lock"
  cgroup: Disable IRQs while holding css_set_lock
  ANDROID: proc: fix undefined behavior in proc_uid_base_readdir
  x86: vdso: Fix leaky vdso linker with CC=clang.
  ANDROID: build: cuttlefish: Upgrade clang to newer version.
  ANDROID: build: cuttlefish: Upgrade clang to newer version.
  ANDROID: build: cuttlefish: Fix path to clang.
  UPSTREAM: dm bufio: avoid sleeping while holding the dm_bufio lock
  ANDROID: sdcardfs: Don't d_drop in d_revalidate

Conflicts:
	arch/arm64/include/asm/cputype.h
	fs/ext4/crypto.c
	fs/ext4/ext4.h
	kernel/cgroup.c
	mm/vmscan.c

Change-Id: Ic10c5722b6439af1cf423fd949c493f786764d7e
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
This commit is contained in:
Srinivasarao P 2018-05-29 12:11:09 +05:30
commit 9848856fe1
142 changed files with 1454 additions and 1007 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
Makefile
View file

@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 4
SUBLEVEL = 132
SUBLEVEL = 133
EXTRAVERSION =
NAME = Blurry Fish Butt

26
arch/alpha/include/asm/futex.h
View file

@ -29,18 +29,10 @@
: "r" (uaddr), "r"(oparg) \
: "memory")
static inline int futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
@ -66,17 +58,9 @@ static inline int futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

40
arch/arc/include/asm/futex.h
View file

@ -73,20 +73,11 @@
#endif
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
#ifndef CONFIG_ARC_HAS_LLSC
preempt_disable(); /* to guarantee atomic r-m-w of futex op */
#endif
@ -118,30 +109,9 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
preempt_enable();
#endif
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (oldval == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (oldval != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (oldval < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (oldval >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (oldval <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (oldval > cmparg);
break;
default:
ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

1
arch/arm/boot/dts/imx6qdl-wandboard.dtsi
View file

@ -88,7 +88,6 @@
clocks = <&clks 201>;
VDDA-supply = <&reg_2p5v>;
VDDIO-supply = <&reg_3p3v>;
lrclk-strength = <3>;
};
};

10
arch/arm/include/asm/assembler.h
View file

@ -530,4 +530,14 @@ THUMB( orr \reg , \reg , #PSR_T_BIT )
#endif
.endm
#ifdef CONFIG_KPROBES
#define _ASM_NOKPROBE(entry) \
.pushsection "_kprobe_blacklist", "aw" ; \
.balign 4 ; \
.long entry; \
.popsection
#else
#define _ASM_NOKPROBE(entry)
#endif
#endif /* __ASM_ASSEMBLER_H__ */

26
arch/arm/include/asm/futex.h
View file

@ -128,20 +128,10 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
#endif /* !SMP */
static inline int
futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret, tmp;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
#ifndef CONFIG_SMP
preempt_disable();
#endif
@ -172,17 +162,9 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
preempt_enable();
#endif
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

5
arch/arm/kernel/traps.c
View file

@ -19,6 +19,7 @@
#include <linux/uaccess.h>
#include <linux/hardirq.h>
#include <linux/kdebug.h>
#include <linux/kprobes.h>
#include <linux/module.h>
#include <linux/kexec.h>
#include <linux/bug.h>
@ -396,7 +397,8 @@ void unregister_undef_hook(struct undef_hook *hook)
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
static int call_undef_hook(struct pt_regs *regs, unsigned int instr)
static nokprobe_inline
int call_undef_hook(struct pt_regs *regs, unsigned int instr)
{
struct undef_hook *hook;
unsigned long flags;
@ -469,6 +471,7 @@ die_sig:
arm_notify_die("Oops - undefined instruction", regs, &info, 0, 6);
}
NOKPROBE_SYMBOL(do_undefinstr)
/*
* Handle FIQ similarly to NMI on x86 systems.

10
arch/arm/lib/getuser.S
View file

@ -38,6 +38,7 @@ ENTRY(__get_user_1)
mov r0, #0
ret lr
ENDPROC(__get_user_1)
_ASM_NOKPROBE(__get_user_1)
ENTRY(__get_user_2)
check_uaccess r0, 2, r1, r2, __get_user_bad
@ -58,6 +59,7 @@ rb .req r0
mov r0, #0
ret lr
ENDPROC(__get_user_2)
_ASM_NOKPROBE(__get_user_2)
ENTRY(__get_user_4)
check_uaccess r0, 4, r1, r2, __get_user_bad
@ -65,6 +67,7 @@ ENTRY(__get_user_4)
mov r0, #0
ret lr
ENDPROC(__get_user_4)
_ASM_NOKPROBE(__get_user_4)
ENTRY(__get_user_8)
check_uaccess r0, 8, r1, r2, __get_user_bad8
@ -78,6 +81,7 @@ ENTRY(__get_user_8)
mov r0, #0
ret lr
ENDPROC(__get_user_8)
_ASM_NOKPROBE(__get_user_8)
#ifdef __ARMEB__
ENTRY(__get_user_32t_8)
@ -91,6 +95,7 @@ ENTRY(__get_user_32t_8)
mov r0, #0
ret lr
ENDPROC(__get_user_32t_8)
_ASM_NOKPROBE(__get_user_32t_8)
ENTRY(__get_user_64t_1)
check_uaccess r0, 1, r1, r2, __get_user_bad8
@ -98,6 +103,7 @@ ENTRY(__get_user_64t_1)
mov r0, #0
ret lr
ENDPROC(__get_user_64t_1)
_ASM_NOKPROBE(__get_user_64t_1)
ENTRY(__get_user_64t_2)
check_uaccess r0, 2, r1, r2, __get_user_bad8
@ -114,6 +120,7 @@ rb .req r0
mov r0, #0
ret lr
ENDPROC(__get_user_64t_2)
_ASM_NOKPROBE(__get_user_64t_2)
ENTRY(__get_user_64t_4)
check_uaccess r0, 4, r1, r2, __get_user_bad8
@ -121,6 +128,7 @@ ENTRY(__get_user_64t_4)
mov r0, #0
ret lr
ENDPROC(__get_user_64t_4)
_ASM_NOKPROBE(__get_user_64t_4)
#endif
__get_user_bad8:
@ -131,6 +139,8 @@ __get_user_bad:
ret lr
ENDPROC(__get_user_bad)
ENDPROC(__get_user_bad8)
_ASM_NOKPROBE(__get_user_bad)
_ASM_NOKPROBE(__get_user_bad8)
.pushsection __ex_table, "a"
.long 1b, __get_user_bad

4
arch/arm/probes/kprobes/opt-arm.c
View file

@ -165,13 +165,14 @@ optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
{
unsigned long flags;
struct kprobe *p = &op->kp;
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe_ctlblk *kcb;
/* Save skipped registers */
regs->ARM_pc = (unsigned long)op->kp.addr;
regs->ARM_ORIG_r0 = ~0UL;
local_irq_save(flags);
kcb = get_kprobe_ctlblk();
if (kprobe_running()) {
kprobes_inc_nmissed_count(&op->kp);
@ -191,6 +192,7 @@ optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
local_irq_restore(flags);
}
NOKPROBE_SYMBOL(optimized_callback)
int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig)
{

14
arch/arm64/Kconfig
View file

@ -465,6 +465,20 @@ config ARM64_ERRATUM_843419
If unsure, say Y.
config ARM64_ERRATUM_1024718
bool "Cortex-A55: 1024718: Update of DBM/AP bits without break before make might result in incorrect update"
default y
help
This option adds work around for Arm Cortex-A55 Erratum 1024718.
Affected Cortex-A55 cores (r0p0, r0p1, r1p0) could cause incorrect
update of the hardware dirty bit when the DBM/AP bits are updated
without a break-before-make. The work around is to disable the usage
of hardware DBM locally on the affected cores. CPUs not affected by
erratum will continue to use the feature.
If unsure, say Y.
config CAVIUM_ERRATUM_22375
bool "Cavium erratum 22375, 24313"
default y

40
arch/arm64/include/asm/assembler.h
View file

@ -27,6 +27,7 @@
#include <asm/cpufeature.h>
#include <asm/page.h>
#include <asm/pgtable-hwdef.h>
#include <asm/cputype.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
@ -410,4 +411,43 @@ alternative_endif
mrs \rd, sp_el0
.endm
/*
* Check the MIDR_EL1 of the current CPU for a given model and a range of
* variant/revision. See asm/cputype.h for the macros used below.
*
* model: MIDR_CPU_PART of CPU
* rv_min: Minimum of MIDR_CPU_VAR_REV()
* rv_max: Maximum of MIDR_CPU_VAR_REV()
* res: Result register.
* tmp1, tmp2, tmp3: Temporary registers
*
* Corrupts: res, tmp1, tmp2, tmp3
* Returns: 0, if the CPU id doesn't match. Non-zero otherwise
*/
.macro cpu_midr_match model, rv_min, rv_max, res, tmp1, tmp2, tmp3
mrs \res, midr_el1
mov_q \tmp1, (MIDR_REVISION_MASK | MIDR_VARIANT_MASK)
mov_q \tmp2, MIDR_CPU_PART_MASK
and \tmp3, \res, \tmp2 // Extract model
and \tmp1, \res, \tmp1 // rev & variant
mov_q \tmp2, \model
cmp \tmp3, \tmp2
cset \res, eq
cbz \res, .Ldone\@ // Model matches ?
.if (\rv_min != 0) // Skip min check if rv_min == 0
mov_q \tmp3, \rv_min
cmp \tmp1, \tmp3
cset \res, ge
.endif // \rv_min != 0
/* Skip rv_max check if rv_min == rv_max && rv_min != 0 */
.if ((\rv_min != \rv_max) || \rv_min == 0)
mov_q \tmp2, \rv_max
cmp \tmp1, \tmp2
cset \tmp2, le
and \res, \res, \tmp2
.endif
.Ldone\@:
.endm
#endif /* __ASM_ASSEMBLER_H */

13
arch/arm64/include/asm/cputype.h
View file

@ -55,6 +55,14 @@
#define MIDR_IMPLEMENTOR(midr) \
(((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT)
#define MIDR_CPU_VAR_REV(var, rev) \
(((var) << MIDR_VARIANT_SHIFT) | (rev))
#define MIDR_CPU_PART_MASK \
(MIDR_IMPLEMENTOR_MASK | \
MIDR_ARCHITECTURE_MASK | \
MIDR_PARTNUM_MASK)
#define MIDR_CPU_MODEL(imp, partnum) \
(((imp) << MIDR_IMPLEMENTOR_SHIFT) | \
(0xf << MIDR_ARCHITECTURE_SHIFT) | \
@ -78,9 +86,9 @@
#define ARM_CPU_PART_AEM_V8 0xD0F
#define ARM_CPU_PART_FOUNDATION 0xD00
#define ARM_CPU_PART_CORTEX_A57 0xD07
#define ARM_CPU_PART_CORTEX_A72 0xD08
#define ARM_CPU_PART_CORTEX_A53 0xD03
#define ARM_CPU_PART_CORTEX_A55 0xD05
#define ARM_CPU_PART_CORTEX_A57 0xD07
#define ARM_CPU_PART_CORTEX_A72 0xD08
#define ARM_CPU_PART_CORTEX_A73 0xD09
#define ARM_CPU_PART_CORTEX_A75 0xD0A
@ -93,6 +101,7 @@
#define CAVIUM_CPU_PART_THUNDERX 0x0A1
#define MIDR_CORTEX_A53 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
#define MIDR_CORTEX_A55 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A55)
#define MIDR_CORTEX_A57 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
#define MIDR_CORTEX_A72 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A72)
#define MIDR_CORTEX_A73 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A73)

26
arch/arm64/include/asm/futex.h
View file

@ -48,20 +48,10 @@ do { \
} while (0)
static inline int
futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (int)(encoded_op << 8) >> 20;
int cmparg = (int)(encoded_op << 20) >> 20;
int oldval = 0, ret, tmp;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1U << (oparg & 0x1f);
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
switch (op) {
@ -91,17 +81,9 @@ futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

5
arch/arm64/mm/proc.S
View file

@ -281,6 +281,11 @@ ENTRY(__cpu_setup)
cbz x9, 2f
cmp x9, #2
b.lt 1f
#ifdef CONFIG_ARM64_ERRATUM_1024718
/* Disable hardware DBM on Cortex-A55 r0p0, r0p1 & r1p0 */
cpu_midr_match MIDR_CORTEX_A55, MIDR_CPU_VAR_REV(0, 0), MIDR_CPU_VAR_REV(1, 0), x1, x2, x3, x4
cbnz x1, 1f
#endif
orr x10, x10, #TCR_HD // hardware Dirty flag update
1: orr x10, x10, #TCR_HA // hardware Access flag update
2:

3
arch/frv/include/asm/futex.h
View file

@ -7,7 +7,8 @@
#include <asm/errno.h>
#include <asm/uaccess.h>
extern int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr);
extern int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr);
static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,

27
arch/frv/kernel/futex.c
View file

@ -186,20 +186,10 @@ static inline int atomic_futex_op_xchg_xor(int oparg, u32 __user *uaddr, int *_o
/*
* do the futex operations
*/
int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
switch (op) {
@ -225,18 +215,9 @@ int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS; break;
}
}
if (!ret)
*oval = oldval;
return ret;
} /* end futex_atomic_op_inuser() */
} /* end arch_futex_atomic_op_inuser() */

38
arch/hexagon/include/asm/futex.h
View file

@ -31,18 +31,9 @@
static inline int
futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
pagefault_disable();
@ -72,30 +63,9 @@ futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (oldval == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (oldval != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (oldval < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (oldval >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (oldval <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (oldval > cmparg);
break;
default:
ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

25
arch/ia64/include/asm/futex.h
View file

@ -45,18 +45,9 @@ do { \
} while (0)
static inline int
futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
@ -84,17 +75,9 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

38
arch/microblaze/include/asm/futex.h
View file

@ -29,18 +29,9 @@
})
static inline int
futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
@ -66,30 +57,9 @@ futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (oldval == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (oldval != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (oldval < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (oldval >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (oldval <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (oldval > cmparg);
break;
default:
ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

25
arch/mips/include/asm/futex.h
View file

@ -83,18 +83,9 @@
}
static inline int
futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
@ -125,17 +116,9 @@ futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

25
arch/parisc/include/asm/futex.h
View file

@ -32,20 +32,11 @@ _futex_spin_unlock_irqrestore(u32 __user *uaddr, unsigned long int *flags)
}
static inline int
futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
unsigned long int flags;
u32 val;
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(*uaddr)))
return -EFAULT;
pagefault_disable();
@ -98,17 +89,9 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

5
arch/powerpc/include/asm/firmware.h
View file

@ -47,12 +47,10 @@
#define FW_FEATURE_VPHN ASM_CONST(0x0000000004000000)
#define FW_FEATURE_XCMO ASM_CONST(0x0000000008000000)
#define FW_FEATURE_OPAL ASM_CONST(0x0000000010000000)
#define FW_FEATURE_OPALv2 ASM_CONST(0x0000000020000000)
#define FW_FEATURE_SET_MODE ASM_CONST(0x0000000040000000)
#define FW_FEATURE_BEST_ENERGY ASM_CONST(0x0000000080000000)
#define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
#define FW_FEATURE_PRRN ASM_CONST(0x0000000200000000)
#define FW_FEATURE_OPALv3 ASM_CONST(0x0000000400000000)
#ifndef __ASSEMBLY__
@ -70,8 +68,7 @@ enum {
FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN,
FW_FEATURE_PSERIES_ALWAYS = 0,
FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_OPALv2 |
FW_FEATURE_OPALv3,
FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
FW_FEATURE_POWERNV_ALWAYS = 0,
FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,

26
arch/powerpc/include/asm/futex.h
View file

@ -31,18 +31,10 @@
: "b" (uaddr), "i" (-EFAULT), "r" (oparg) \
: "cr0", "memory")
static inline int futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
@ -68,17 +60,9 @@ static inline int futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

11
arch/powerpc/kernel/setup-common.c
View file

@ -217,14 +217,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
unsigned short maj;
unsigned short min;
/* We only show online cpus: disable preempt (overzealous, I
* knew) to prevent cpu going down. */
preempt_disable();
if (!cpu_online(cpu_id)) {
preempt_enable();
return 0;
}
#ifdef CONFIG_SMP
pvr = per_cpu(cpu_pvr, cpu_id);
#else
@ -329,9 +321,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
#ifdef CONFIG_SMP
seq_printf(m, "\n");
#endif
preempt_enable();
/* If this is the last cpu, print the summary */
if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
show_cpuinfo_summary(m);

4
arch/powerpc/platforms/powernv/eeh-powernv.c
View file

@ -48,8 +48,8 @@ static int pnv_eeh_init(void)
struct pci_controller *hose;
struct pnv_phb *phb;
if (!firmware_has_feature(FW_FEATURE_OPALv3)) {
pr_warn("%s: OPALv3 is required !\n",
if (!firmware_has_feature(FW_FEATURE_OPAL)) {
pr_warn("%s: OPAL is required !\n",
__func__);
return -EINVAL;
}

2
arch/powerpc/platforms/powernv/idle.c
View file

@ -242,7 +242,7 @@ static int __init pnv_init_idle_states(void)
if (cpuidle_disable != IDLE_NO_OVERRIDE)
goto out;
if (!firmware_has_feature(FW_FEATURE_OPALv3))
if (!firmware_has_feature(FW_FEATURE_OPAL))
goto out;
power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");

14
arch/powerpc/platforms/powernv/opal-nvram.c
View file

@ -44,6 +44,10 @@ static ssize_t opal_nvram_read(char *buf, size_t count, loff_t *index)
return count;
}
/*
* This can be called in the panic path with interrupts off, so use
* mdelay in that case.
*/
static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
{
s64 rc = OPAL_BUSY;
@ -58,10 +62,16 @@ static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
rc = opal_write_nvram(__pa(buf), count, off);
if (rc == OPAL_BUSY_EVENT) {
msleep(OPAL_BUSY_DELAY_MS);
if (in_interrupt() || irqs_disabled())
mdelay(OPAL_BUSY_DELAY_MS);
else
msleep(OPAL_BUSY_DELAY_MS);
opal_poll_events(NULL);
} else if (rc == OPAL_BUSY) {
msleep(OPAL_BUSY_DELAY_MS);
if (in_interrupt() || irqs_disabled())
mdelay(OPAL_BUSY_DELAY_MS);
else
msleep(OPAL_BUSY_DELAY_MS);
}
}

2
arch/powerpc/platforms/powernv/opal-xscom.c
View file

@ -126,7 +126,7 @@ static const struct scom_controller opal_scom_controller = {
static int opal_xscom_init(void)
{
if (firmware_has_feature(FW_FEATURE_OPALv3))
if (firmware_has_feature(FW_FEATURE_OPAL))
scom_init(&opal_scom_controller);
return 0;
}

36
arch/powerpc/platforms/powernv/opal.c
View file

@ -98,16 +98,11 @@ int __init early_init_dt_scan_opal(unsigned long node,
pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%d)\n",
opal.size, sizep, runtimesz);
powerpc_firmware_features |= FW_FEATURE_OPAL;
if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) {
powerpc_firmware_features |= FW_FEATURE_OPALv2;
powerpc_firmware_features |= FW_FEATURE_OPALv3;
pr_info("OPAL V3 detected !\n");
} else if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) {
powerpc_firmware_features |= FW_FEATURE_OPALv2;
pr_info("OPAL V2 detected !\n");
powerpc_firmware_features |= FW_FEATURE_OPAL;
pr_info("OPAL detected !\n");
} else {
pr_info("OPAL V1 detected !\n");
panic("OPAL != V3 detected, no longer supported.\n");
}
/* Reinit all cores with the right endian */
@ -352,17 +347,15 @@ int opal_put_chars(uint32_t vtermno, const char *data, int total_len)
* enough room and be done with it
*/
spin_lock_irqsave(&opal_write_lock, flags);
if (firmware_has_feature(FW_FEATURE_OPALv2)) {
rc = opal_console_write_buffer_space(vtermno, &olen);
len = be64_to_cpu(olen);
if (rc || len < total_len) {
spin_unlock_irqrestore(&opal_write_lock, flags);
/* Closed -> drop characters */
if (rc)
return total_len;
opal_poll_events(NULL);
return -EAGAIN;
}
rc = opal_console_write_buffer_space(vtermno, &olen);
len = be64_to_cpu(olen);
if (rc || len < total_len) {
spin_unlock_irqrestore(&opal_write_lock, flags);
/* Closed -> drop characters */
if (rc)
return total_len;
opal_poll_events(NULL);
return -EAGAIN;
}
/* We still try to handle partial completions, though they
@ -696,10 +689,7 @@ static int __init opal_init(void)
}
/* Register OPAL consoles if any ports */
if (firmware_has_feature(FW_FEATURE_OPALv2))
consoles = of_find_node_by_path("/ibm,opal/consoles");
else
consoles = of_node_get(opal_node);
consoles = of_find_node_by_path("/ibm,opal/consoles");
if (consoles) {
for_each_child_of_node(consoles, np) {
if (strcmp(np->name, "serial"))

2
arch/powerpc/platforms/powernv/pci-ioda.c
View file

@ -344,7 +344,7 @@ static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb)
return;
}
if (!firmware_has_feature(FW_FEATURE_OPALv3)) {
if (!firmware_has_feature(FW_FEATURE_OPAL)) {
pr_info(" Firmware too old to support M64 window\n");
return;
}

12
arch/powerpc/platforms/powernv/setup.c
View file

@ -140,12 +140,8 @@ static void pnv_show_cpuinfo(struct seq_file *m)
if (root)
model = of_get_property(root, "model", NULL);
seq_printf(m, "machine\t\t: PowerNV %s\n", model);
if (firmware_has_feature(FW_FEATURE_OPALv3))
seq_printf(m, "firmware\t: OPAL v3\n");
else if (firmware_has_feature(FW_FEATURE_OPALv2))
seq_printf(m, "firmware\t: OPAL v2\n");
else if (firmware_has_feature(FW_FEATURE_OPAL))
seq_printf(m, "firmware\t: OPAL v1\n");
if (firmware_has_feature(FW_FEATURE_OPAL))
seq_printf(m, "firmware\t: OPAL\n");
else
seq_printf(m, "firmware\t: BML\n");
of_node_put(root);
@ -274,9 +270,9 @@ static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
{
xics_kexec_teardown_cpu(secondary);
/* On OPAL v3, we return all CPUs to firmware */
/* On OPAL, we return all CPUs to firmware */
if (!firmware_has_feature(FW_FEATURE_OPALv3))
if (!firmware_has_feature(FW_FEATURE_OPAL))
return;
if (secondary) {

74
arch/powerpc/platforms/powernv/smp.c
View file

@ -61,14 +61,15 @@ static int pnv_smp_kick_cpu(int nr)
unsigned long start_here =
__pa(ppc_function_entry(generic_secondary_smp_init));
long rc;
uint8_t status;
BUG_ON(nr < 0 || nr >= NR_CPUS);
/*
* If we already started or OPALv2 is not supported, we just
* If we already started or OPAL is not supported, we just
* kick the CPU via the PACA
*/
if (paca[nr].cpu_start || !firmware_has_feature(FW_FEATURE_OPALv2))
if (paca[nr].cpu_start || !firmware_has_feature(FW_FEATURE_OPAL))
goto kick;
/*
@ -77,55 +78,42 @@ static int pnv_smp_kick_cpu(int nr)
* first time. OPAL v3 allows us to query OPAL to know if it
* has the CPUs, so we do that
*/
if (firmware_has_feature(FW_FEATURE_OPALv3)) {
uint8_t status;
rc = opal_query_cpu_status(pcpu, &status);
if (rc != OPAL_SUCCESS) {
pr_warn("OPAL Error %ld querying CPU %d state\n", rc, nr);
return -ENODEV;
}
rc = opal_query_cpu_status(pcpu, &status);
/*
* Already started, just kick it, probably coming from
* kexec and spinning
*/
if (status == OPAL_THREAD_STARTED)
goto kick;
/*
* Available/inactive, let's kick it
*/
if (status == OPAL_THREAD_INACTIVE) {
pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu);
rc = opal_start_cpu(pcpu, start_here);
if (rc != OPAL_SUCCESS) {
pr_warn("OPAL Error %ld querying CPU %d state\n",
rc, nr);
return -ENODEV;
}
/*
* Already started, just kick it, probably coming from
* kexec and spinning
*/
if (status == OPAL_THREAD_STARTED)
goto kick;
/*
* Available/inactive, let's kick it
*/
if (status == OPAL_THREAD_INACTIVE) {
pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n",
nr, pcpu);
rc = opal_start_cpu(pcpu, start_here);
if (rc != OPAL_SUCCESS) {
pr_warn("OPAL Error %ld starting CPU %d\n",
rc, nr);
return -ENODEV;
}
} else {
/*
* An unavailable CPU (or any other unknown status)
* shouldn't be started. It should also
* not be in the possible map but currently it can
* happen
*/
pr_devel("OPAL: CPU %d (HW 0x%x) is unavailable"
" (status %d)...\n", nr, pcpu, status);
pr_warn("OPAL Error %ld starting CPU %d\n", rc, nr);
return -ENODEV;
}
} else {
/*
* On OPAL v2, we just kick it and hope for the best,
* we must not test the error from opal_start_cpu() or
* we would fail to get CPUs from kexec.
* An unavailable CPU (or any other unknown status)
* shouldn't be started. It should also
* not be in the possible map but currently it can
* happen
*/
opal_start_cpu(pcpu, start_here);
pr_devel("OPAL: CPU %d (HW 0x%x) is unavailable"
" (status %d)...\n", nr, pcpu, status);
return -ENODEV;
}
kick:
kick:
return smp_generic_kick_cpu(nr);
}

108
arch/s390/include/asm/alternative-asm.h Normal file
View file

@ -0,0 +1,108 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_ALTERNATIVE_ASM_H
#define _ASM_S390_ALTERNATIVE_ASM_H
#ifdef __ASSEMBLY__
/*
* Check the length of an instruction sequence. The length may not be larger
* than 254 bytes and it has to be divisible by 2.
*/
.macro alt_len_check start,end
.if ( \end - \start ) > 254
.error "cpu alternatives does not support instructions blocks > 254 bytes\n"
.endif
.if ( \end - \start ) % 2
.error "cpu alternatives instructions length is odd\n"
.endif
.endm
/*
* Issue one struct alt_instr descriptor entry (need to put it into
* the section .altinstructions, see below). This entry contains
* enough information for the alternatives patching code to patch an
* instruction. See apply_alternatives().
*/
.macro alt_entry orig_start, orig_end, alt_start, alt_end, feature
.long \orig_start - .
.long \alt_start - .
.word \feature
.byte \orig_end - \orig_start
.byte \alt_end - \alt_start
.endm
/*
* Fill up @bytes with nops. The macro emits 6-byte nop instructions
* for the bulk of the area, possibly followed by a 4-byte and/or
* a 2-byte nop if the size of the area is not divisible by 6.
*/
.macro alt_pad_fill bytes
.fill ( \bytes ) / 6, 6, 0xc0040000
.fill ( \bytes ) % 6 / 4, 4, 0x47000000
.fill ( \bytes ) % 6 % 4 / 2, 2, 0x0700
.endm
/*
* Fill up @bytes with nops. If the number of bytes is larger
* than 6, emit a jg instruction to branch over all nops, then
* fill an area of size (@bytes - 6) with nop instructions.
*/
.macro alt_pad bytes
.if ( \bytes > 0 )
.if ( \bytes > 6 )
jg . + \bytes
alt_pad_fill \bytes - 6
.else
alt_pad_fill \bytes
.endif
.endif
.endm
/*
* Define an alternative between two instructions. If @feature is
* present, early code in apply_alternatives() replaces @oldinstr with
* @newinstr. ".skip" directive takes care of proper instruction padding
* in case @newinstr is longer than @oldinstr.
*/
.macro ALTERNATIVE oldinstr, newinstr, feature
.pushsection .altinstr_replacement,"ax"
770: \newinstr
771: .popsection
772: \oldinstr
773: alt_len_check 770b, 771b
alt_len_check 772b, 773b
alt_pad ( ( 771b - 770b ) - ( 773b - 772b ) )
774: .pushsection .altinstructions,"a"
alt_entry 772b, 774b, 770b, 771b, \feature
.popsection
.endm
/*
* Define an alternative between two instructions. If @feature is
* present, early code in apply_alternatives() replaces @oldinstr with
* @newinstr. ".skip" directive takes care of proper instruction padding
* in case @newinstr is longer than @oldinstr.
*/
.macro ALTERNATIVE_2 oldinstr, newinstr1, feature1, newinstr2, feature2
.pushsection .altinstr_replacement,"ax"
770: \newinstr1
771: \newinstr2
772: .popsection
773: \oldinstr
774: alt_len_check 770b, 771b
alt_len_check 771b, 772b
alt_len_check 773b, 774b
.if ( 771b - 770b > 772b - 771b )
alt_pad ( ( 771b - 770b ) - ( 774b - 773b ) )
.else
alt_pad ( ( 772b - 771b ) - ( 774b - 773b ) )
.endif
775: .pushsection .altinstructions,"a"
alt_entry 773b, 775b, 770b, 771b,\feature1
alt_entry 773b, 775b, 771b, 772b,\feature2
.popsection
.endm
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_ALTERNATIVE_ASM_H */

23
arch/s390/include/asm/futex.h
View file

@ -21,17 +21,12 @@
: "0" (-EFAULT), "d" (oparg), "a" (uaddr), \
"m" (*uaddr) : "cc");
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, newval, ret;
load_kernel_asce();
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
pagefault_disable();
switch (op) {
@ -60,17 +55,9 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
}
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

182
arch/s390/include/asm/nospec-insn.h Normal file
View file

@ -0,0 +1,182 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_NOSPEC_ASM_H
#define _ASM_S390_NOSPEC_ASM_H
#ifdef __ASSEMBLY__
#ifdef CONFIG_EXPOLINE
/*
* The expoline macros are used to create thunks in the same format
* as gcc generates them. The 'comdat' section flag makes sure that
* the various thunks are merged into a single copy.
*/
.macro __THUNK_PROLOG_NAME name
.pushsection .text.\name,"axG",@progbits,\name,comdat
.globl \name
.hidden \name
.type \name,@function
\name:
.cfi_startproc
.endm
.macro __THUNK_EPILOG
.cfi_endproc
.popsection
.endm
.macro __THUNK_PROLOG_BR r1,r2
__THUNK_PROLOG_NAME __s390x_indirect_jump_r\r2\()use_r\r1
.endm
.macro __THUNK_PROLOG_BC d0,r1,r2
__THUNK_PROLOG_NAME __s390x_indirect_branch_\d0\()_\r2\()use_\r1
.endm
.macro __THUNK_BR r1,r2
jg __s390x_indirect_jump_r\r2\()use_r\r1
.endm
.macro __THUNK_BC d0,r1,r2
jg __s390x_indirect_branch_\d0\()_\r2\()use_\r1
.endm
.macro __THUNK_BRASL r1,r2,r3
brasl \r1,__s390x_indirect_jump_r\r3\()use_r\r2
.endm
.macro __DECODE_RR expand,reg,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r2
\expand \r1,\r2
.set __decode_fail,0
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_RR failed"
.endif
.endm
.macro __DECODE_RRR expand,rsave,rtarget,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rsave,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rtarget,%r\r2
.irp r3,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r3
\expand \r1,\r2,\r3
.set __decode_fail,0
.endif
.endr
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_RRR failed"
.endif
.endm
.macro __DECODE_DRR expand,disp,reg,ruse
.set __decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \ruse,%r\r2
\expand \disp,\r1,\r2
.set __decode_fail,0
.endif
.endr
.endif
.endr
.if __decode_fail == 1
.error "__DECODE_DRR failed"
.endif
.endm
.macro __THUNK_EX_BR reg,ruse
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,555f
j .
#else
larl \ruse,555f
ex 0,0(\ruse)
j .
#endif
555: br \reg
.endm
.macro __THUNK_EX_BC disp,reg,ruse
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,556f
j .
#else
larl \ruse,556f
ex 0,0(\ruse)
j .
#endif
556: b \disp(\reg)
.endm
.macro GEN_BR_THUNK reg,ruse=%r1
__DECODE_RR __THUNK_PROLOG_BR,\reg,\ruse
__THUNK_EX_BR \reg,\ruse
__THUNK_EPILOG
.endm
.macro GEN_B_THUNK disp,reg,ruse=%r1
__DECODE_DRR __THUNK_PROLOG_BC,\disp,\reg,\ruse
__THUNK_EX_BC \disp,\reg,\ruse
__THUNK_EPILOG
.endm
.macro BR_EX reg,ruse=%r1
557: __DECODE_RR __THUNK_BR,\reg,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 557b-.
.popsection
.endm
.macro B_EX disp,reg,ruse=%r1
558: __DECODE_DRR __THUNK_BC,\disp,\reg,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 558b-.
.popsection
.endm
.macro BASR_EX rsave,rtarget,ruse=%r1
559: __DECODE_RRR __THUNK_BRASL,\rsave,\rtarget,\ruse
.pushsection .s390_indirect_branches,"a",@progbits
.long 559b-.
.popsection
.endm
#else
.macro GEN_BR_THUNK reg,ruse=%r1
.endm
.macro GEN_B_THUNK disp,reg,ruse=%r1
.endm
.macro BR_EX reg,ruse=%r1
br \reg
.endm
.macro B_EX disp,reg,ruse=%r1
b \disp(\reg)
.endm
.macro BASR_EX rsave,rtarget,ruse=%r1
basr \rsave,\rtarget
.endm
#endif
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NOSPEC_ASM_H */

1
arch/s390/kernel/Makefile
View file

@ -49,6 +49,7 @@ obj-y += nospec-branch.o
extra-y += head.o head64.o vmlinux.lds
obj-$(CONFIG_SYSFS) += nospec-sysfs.o
CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)
obj-$(CONFIG_MODULES) += s390_ksyms.o module.o

24
arch/s390/kernel/base.S
View file

@ -8,18 +8,22 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/ptrace.h>
#include <asm/sigp.h>
GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
ENTRY(s390_base_mcck_handler)
basr %r13,0
0: lg %r15,__LC_PANIC_STACK # load panic stack
aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_mcck_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
1: la %r1,4095
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
lpswe __LC_MCK_OLD_PSW
@ -36,10 +40,10 @@ ENTRY(s390_base_ext_handler)
basr %r13,0
0: aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_ext_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC
ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
lpswe __LC_EXT_OLD_PSW
@ -56,10 +60,10 @@ ENTRY(s390_base_pgm_handler)
basr %r13,0
0: aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_pgm_handler_fn
lg %r1,0(%r1)
ltgr %r1,%r1
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
basr %r14,%r1
BASR_EX %r14,%r9
lmg %r0,%r15,__LC_SAVE_AREA_SYNC
lpswe __LC_PGM_OLD_PSW
1: lpswe disabled_wait_psw-0b(%r13)
@ -116,7 +120,7 @@ ENTRY(diag308_reset)
larl %r4,.Lcontinue_psw # Restore PSW flags
lpswe 0(%r4)
.Lcontinue:
br %r14
BR_EX %r14
.align 16
.Lrestart_psw:
.long 0x00080000,0x80000000 + .Lrestart_part2

105
arch/s390/kernel/entry.S
View file

@ -23,6 +23,7 @@
#include <asm/vx-insn.h>
#include <asm/setup.h>
#include <asm/nmi.h>
#include <asm/nospec-insn.h>
__PT_R0 = __PT_GPRS
__PT_R1 = __PT_GPRS + 8
@ -225,74 +226,16 @@ _PIF_WORK = (_PIF_PER_TRAP)
.popsection
.endm
#ifdef CONFIG_EXPOLINE
.macro GEN_BR_THUNK name,reg,tmp
.section .text.\name,"axG",@progbits,\name,comdat
.globl \name
.hidden \name
.type \name,@function
\name:
.cfi_startproc
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
exrl 0,0f
#else
larl \tmp,0f
ex 0,0(\tmp)
#endif
j .
0: br \reg
.cfi_endproc
.endm
GEN_BR_THUNK __s390x_indirect_jump_r1use_r9,%r9,%r1
GEN_BR_THUNK __s390x_indirect_jump_r1use_r14,%r14,%r1
GEN_BR_THUNK __s390x_indirect_jump_r11use_r14,%r14,%r11
.macro BASR_R14_R9
0: brasl %r14,__s390x_indirect_jump_r1use_r9
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
.macro BR_R1USE_R14
0: jg __s390x_indirect_jump_r1use_r14
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
.macro BR_R11USE_R14
0: jg __s390x_indirect_jump_r11use_r14
.pushsection .s390_indirect_branches,"a",@progbits
.long 0b-.
.popsection
.endm
#else /* CONFIG_EXPOLINE */
.macro BASR_R14_R9
basr %r14,%r9
.endm
.macro BR_R1USE_R14
br %r14
.endm
.macro BR_R11USE_R14
br %r14
.endm
#endif /* CONFIG_EXPOLINE */
GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
GEN_BR_THUNK %r14,%r11
.section .kprobes.text, "ax"
ENTRY(__bpon)
.globl __bpon
BPON
BR_R1USE_R14
BR_EX %r14
/*
* Scheduler resume function, called by switch_to
@ -322,7 +265,7 @@ ENTRY(__switch_to)
TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP
jz 0f
.insn s,0xb2800000,__LC_LPP # set program parameter
0: BR_R1USE_R14
0: BR_EX %r14
.L__critical_start:
@ -388,7 +331,7 @@ sie_exit:
xgr %r5,%r5
lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers
lg %r2,__SF_EMPTY+16(%r15) # return exit reason code
BR_R1USE_R14
BR_EX %r14
.Lsie_fault:
lghi %r14,-EFAULT
stg %r14,__SF_EMPTY+16(%r15) # set exit reason code
@ -445,7 +388,7 @@ ENTRY(system_call)
lgf %r9,0(%r8,%r10) # get system call add.
TSTMSK __TI_flags(%r12),_TIF_TRACE
jnz .Lsysc_tracesys
BASR_R14_R9 # call sys_xxxx
BASR_EX %r14,%r9 # call sys_xxxx
stg %r2,__PT_R2(%r11) # store return value
.Lsysc_return:
@ -585,7 +528,7 @@ ENTRY(system_call)
lmg %r3,%r7,__PT_R3(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lg %r2,__PT_ORIG_GPR2(%r11)
BASR_R14_R9 # call sys_xxx
BASR_EX %r14,%r9 # call sys_xxx
stg %r2,__PT_R2(%r11) # store return value
.Lsysc_tracenogo:
TSTMSK __TI_flags(%r12),_TIF_TRACE
@ -609,7 +552,7 @@ ENTRY(ret_from_fork)
lmg %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter)
la %r2,0(%r10)
BASR_R14_R9
BASR_EX %r14,%r9
j .Lsysc_tracenogo
/*
@ -685,7 +628,7 @@ ENTRY(pgm_check_handler)
je .Lpgm_return
lgf %r9,0(%r10,%r1) # load address of handler routine
lgr %r2,%r11 # pass pointer to pt_regs
BASR_R14_R9 # branch to interrupt-handler
BASR_EX %r14,%r9 # branch to interrupt-handler
.Lpgm_return:
LOCKDEP_SYS_EXIT
tm __PT_PSW+1(%r11),0x01 # returning to user ?
@ -962,7 +905,7 @@ ENTRY(psw_idle)
stpt __TIMER_IDLE_ENTER(%r2)
.Lpsw_idle_lpsw:
lpswe __SF_EMPTY(%r15)
BR_R1USE_R14
BR_EX %r14
.Lpsw_idle_end:
/*
@ -1007,7 +950,7 @@ ENTRY(save_fpu_regs)
.Lsave_fpu_regs_done:
oi __LC_CPU_FLAGS+7,_CIF_FPU
.Lsave_fpu_regs_exit:
BR_R1USE_R14
BR_EX %r14
.Lsave_fpu_regs_end:
/*
@ -1054,7 +997,7 @@ load_fpu_regs:
.Lload_fpu_regs_done:
ni __LC_CPU_FLAGS+7,255-_CIF_FPU
.Lload_fpu_regs_exit:
BR_R1USE_R14
BR_EX %r14
.Lload_fpu_regs_end:
.L__critical_end:
@ -1227,7 +1170,7 @@ cleanup_critical:
jl 0f
clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end
jl .Lcleanup_load_fpu_regs
0: BR_R11USE_R14
0: BR_EX %r14
.align 8
.Lcleanup_table:
@ -1257,7 +1200,7 @@ cleanup_critical:
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
BR_R11USE_R14
BR_EX %r14
#endif
.Lcleanup_system_call:
@ -1315,7 +1258,7 @@ cleanup_critical:
stg %r15,56(%r11) # r15 stack pointer
# set new psw address and exit
larl %r9,.Lsysc_do_svc
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_system_call_insn:
.quad system_call
.quad .Lsysc_stmg
@ -1325,7 +1268,7 @@ cleanup_critical:
.Lcleanup_sysc_tif:
larl %r9,.Lsysc_tif
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_sysc_restore:
# check if stpt has been executed
@ -1342,14 +1285,14 @@ cleanup_critical:
mvc 0(64,%r11),__PT_R8(%r9)
lmg %r0,%r7,__PT_R0(%r9)
1: lmg %r8,%r9,__LC_RETURN_PSW
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_sysc_restore_insn:
.quad .Lsysc_exit_timer
.quad .Lsysc_done - 4
.Lcleanup_io_tif:
larl %r9,.Lio_tif
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_io_restore:
# check if stpt has been executed
@ -1363,7 +1306,7 @@ cleanup_critical:
mvc 0(64,%r11),__PT_R8(%r9)
lmg %r0,%r7,__PT_R0(%r9)
1: lmg %r8,%r9,__LC_RETURN_PSW
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_io_restore_insn:
.quad .Lio_exit_timer
.quad .Lio_done - 4
@ -1415,17 +1358,17 @@ cleanup_critical:
# prepare return psw
nihh %r8,0xfcfd # clear irq & wait state bits
lg %r9,48(%r11) # return from psw_idle
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_idle_insn:
.quad .Lpsw_idle_lpsw
.Lcleanup_save_fpu_regs:
larl %r9,save_fpu_regs
BR_R11USE_R14
BR_EX %r14,%r11
.Lcleanup_load_fpu_regs:
larl %r9,load_fpu_regs
BR_R11USE_R14
BR_EX %r14,%r11
/*
* Integer constants

5
arch/s390/kernel/irq.c
View file

@ -173,10 +173,9 @@ void do_softirq_own_stack(void)
new -= STACK_FRAME_OVERHEAD;
((struct stack_frame *) new)->back_chain = old;
asm volatile(" la 15,0(%0)\n"
" basr 14,%2\n"
" brasl 14,__do_softirq\n"
" la 15,0(%1)\n"
: : "a" (new), "a" (old),
"a" (__do_softirq)
: : "a" (new), "a" (old)
: "0", "1", "2", "3", "4", "5", "14",
"cc", "memory" );
} else {

43
arch/s390/kernel/nospec-branch.c
View file

@ -44,24 +44,6 @@ static int __init nospec_report(void)
}
arch_initcall(nospec_report);
#ifdef CONFIG_SYSFS
ssize_t cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
}
ssize_t cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
return sprintf(buf, "Mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
return sprintf(buf, "Mitigation: limited branch prediction.\n");
return sprintf(buf, "Vulnerable\n");
}
#endif
#ifdef CONFIG_EXPOLINE
int nospec_disable = IS_ENABLED(CONFIG_EXPOLINE_OFF);
@ -112,7 +94,6 @@ static void __init_or_module __nospec_revert(s32 *start, s32 *end)
s32 *epo;
/* Second part of the instruction replace is always a nop */
memcpy(insnbuf + 2, (char[]) { 0x47, 0x00, 0x00, 0x00 }, 4);
for (epo = start; epo < end; epo++) {
instr = (u8 *) epo + *epo;
if (instr[0] == 0xc0 && (instr[1] & 0x0f) == 0x04)
@ -133,18 +114,34 @@ static void __init_or_module __nospec_revert(s32 *start, s32 *end)
br = thunk + (*(int *)(thunk + 2)) * 2;
else
continue;
if (br[0] != 0x07 || (br[1] & 0xf0) != 0xf0)
/* Check for unconditional branch 0x07f? or 0x47f???? */
if ((br[0] & 0xbf) != 0x07 || (br[1] & 0xf0) != 0xf0)
continue;
memcpy(insnbuf + 2, (char[]) { 0x47, 0x00, 0x07, 0x00 }, 4);
switch (type) {
case BRCL_EXPOLINE:
/* brcl to thunk, replace with br + nop */
insnbuf[0] = br[0];
insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f);
if (br[0] == 0x47) {
/* brcl to b, replace with bc + nopr */
insnbuf[2] = br[2];
insnbuf[3] = br[3];
} else {
/* brcl to br, replace with bcr + nop */
}
break;
case BRASL_EXPOLINE:
/* brasl to thunk, replace with basr + nop */
insnbuf[0] = 0x0d;
insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f);
if (br[0] == 0x47) {
/* brasl to b, replace with bas + nopr */
insnbuf[0] = 0x4d;
insnbuf[2] = br[2];
insnbuf[3] = br[3];
} else {
/* brasl to br, replace with basr + nop */
insnbuf[0] = 0x0d;
}
break;
}

21
arch/s390/kernel/nospec-sysfs.c Normal file
View file

@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/device.h>
#include <linux/cpu.h>
#include <asm/facility.h>
#include <asm/nospec-branch.h>
ssize_t cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
}
ssize_t cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
return sprintf(buf, "Mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
return sprintf(buf, "Mitigation: limited branch prediction\n");
return sprintf(buf, "Vulnerable\n");
}

4
arch/s390/kernel/perf_cpum_sf.c
View file

@ -744,6 +744,10 @@ static int __hw_perf_event_init(struct perf_event *event)
*/
rate = 0;
if (attr->freq) {
if (!attr->sample_freq) {
err = -EINVAL;
goto out;
}
rate = freq_to_sample_rate(&si, attr->sample_freq);
rate = hw_limit_rate(&si, rate);
attr->freq = 0;

5
arch/s390/kernel/reipl.S
View file

@ -6,8 +6,11 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/sigp.h>
GEN_BR_THUNK %r14
#
# store_status
#
@ -62,7 +65,7 @@ ENTRY(store_status)
st %r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
larl %r2,store_status
stg %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
br %r14
BR_EX %r14
.section .bss
.align 8

10
arch/s390/kernel/swsusp.S
View file

@ -12,6 +12,7 @@
#include <asm/ptrace.h>
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/sigp.h>
/*
@ -23,6 +24,8 @@
* (see below) in the resume process.
* This function runs with disabled interrupts.
*/
GEN_BR_THUNK %r14
.section .text
ENTRY(swsusp_arch_suspend)
stmg %r6,%r15,__SF_GPRS(%r15)
@ -102,7 +105,7 @@ ENTRY(swsusp_arch_suspend)
spx 0x318(%r1)
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
BR_EX %r14
/*
* Restore saved memory image to correct place and restore register context.
@ -196,11 +199,10 @@ pgm_check_entry:
larl %r15,init_thread_union
ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER)
larl %r2,.Lpanic_string
larl %r3,_sclp_print_early
lghi %r1,0
sam31
sigp %r1,%r0,SIGP_SET_ARCHITECTURE
basr %r14,%r3
brasl %r14,_sclp_print_early
larl %r3,.Ldisabled_wait_31
lpsw 0(%r3)
4:
@ -266,7 +268,7 @@ restore_registers:
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
BR_EX %r14
.section .data..nosave,"aw",@progbits
.align 8

9
arch/s390/lib/mem.S
View file

@ -5,6 +5,9 @@
*/
#include <linux/linkage.h>
#include <asm/nospec-insn.h>
GEN_BR_THUNK %r14
/*
* memset implementation
@ -38,7 +41,7 @@ ENTRY(memset)
.Lmemset_clear_rest:
larl %r3,.Lmemset_xc
ex %r4,0(%r3)
br %r14
BR_EX %r14
.Lmemset_fill:
stc %r3,0(%r2)
cghi %r4,1
@ -55,7 +58,7 @@ ENTRY(memset)
.Lmemset_fill_rest:
larl %r3,.Lmemset_mvc
ex %r4,0(%r3)
br %r14
BR_EX %r14
.Lmemset_xc:
xc 0(1,%r1),0(%r1)
.Lmemset_mvc:
@ -77,7 +80,7 @@ ENTRY(memcpy)
.Lmemcpy_rest:
larl %r5,.Lmemcpy_mvc
ex %r4,0(%r5)
br %r14
BR_EX %r14
.Lmemcpy_loop:
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)

16
arch/s390/net/bpf_jit.S
View file

@ -8,6 +8,7 @@
*/
#include <linux/linkage.h>
#include <asm/nospec-insn.h>
#include "bpf_jit.h"
/*
@ -53,7 +54,7 @@ ENTRY(sk_load_##NAME##_pos); \
clg %r3,STK_OFF_HLEN(%r15); /* Offset + SIZE > hlen? */ \
jh sk_load_##NAME##_slow; \
LOAD %r14,-SIZE(%r3,%r12); /* Get data from skb */ \
b OFF_OK(%r6); /* Return */ \
B_EX OFF_OK,%r6; /* Return */ \
\
sk_load_##NAME##_slow:; \
lgr %r2,%r7; /* Arg1 = skb pointer */ \
@ -63,11 +64,14 @@ sk_load_##NAME##_slow:; \
brasl %r14,skb_copy_bits; /* Get data from skb */ \
LOAD %r14,STK_OFF_TMP(%r15); /* Load from temp bufffer */ \
ltgr %r2,%r2; /* Set cc to (%r2 != 0) */ \
br %r6; /* Return */
BR_EX %r6; /* Return */
sk_load_common(word, 4, llgf) /* r14 = *(u32 *) (skb->data+offset) */
sk_load_common(half, 2, llgh) /* r14 = *(u16 *) (skb->data+offset) */
GEN_BR_THUNK %r6
GEN_B_THUNK OFF_OK,%r6
/*
* Load 1 byte from SKB (optimized version)
*/
@ -79,7 +83,7 @@ ENTRY(sk_load_byte_pos)
clg %r3,STK_OFF_HLEN(%r15) # Offset >= hlen?
jnl sk_load_byte_slow
llgc %r14,0(%r3,%r12) # Get byte from skb
b OFF_OK(%r6) # Return OK
B_EX OFF_OK,%r6 # Return OK
sk_load_byte_slow:
lgr %r2,%r7 # Arg1 = skb pointer
@ -89,7 +93,7 @@ sk_load_byte_slow:
brasl %r14,skb_copy_bits # Get data from skb
llgc %r14,STK_OFF_TMP(%r15) # Load result from temp buffer
ltgr %r2,%r2 # Set cc to (%r2 != 0)
br %r6 # Return cc
BR_EX %r6 # Return cc
#define sk_negative_common(NAME, SIZE, LOAD) \
sk_load_##NAME##_slow_neg:; \
@ -103,7 +107,7 @@ sk_load_##NAME##_slow_neg:; \
jz bpf_error; \
LOAD %r14,0(%r2); /* Get data from pointer */ \
xr %r3,%r3; /* Set cc to zero */ \
br %r6; /* Return cc */
BR_EX %r6; /* Return cc */
sk_negative_common(word, 4, llgf)
sk_negative_common(half, 2, llgh)
@ -112,4 +116,4 @@ sk_negative_common(byte, 1, llgc)
bpf_error:
# force a return 0 from jit handler
ltgr %r15,%r15 # Set condition code
br %r6
BR_EX %r6

63
arch/s390/net/bpf_jit_comp.c
View file

@ -24,6 +24,8 @@
#include <linux/bpf.h>
#include <asm/cacheflush.h>
#include <asm/dis.h>
#include <asm/facility.h>
#include <asm/nospec-branch.h>
#include "bpf_jit.h"
int bpf_jit_enable __read_mostly;
@ -41,6 +43,8 @@ struct bpf_jit {
int base_ip; /* Base address for literal pool */
int ret0_ip; /* Address of return 0 */
int exit_ip; /* Address of exit */
int r1_thunk_ip; /* Address of expoline thunk for 'br %r1' */
int r14_thunk_ip; /* Address of expoline thunk for 'br %r14' */
int tail_call_start; /* Tail call start offset */
int labels[1]; /* Labels for local jumps */
};
@ -248,6 +252,19 @@ static inline void reg_set_seen(struct bpf_jit *jit, u32 b1)
REG_SET_SEEN(b2); \
})
#define EMIT6_PCREL_RILB(op, b, target) \
({ \
int rel = (target - jit->prg) / 2; \
_EMIT6(op | reg_high(b) << 16 | rel >> 16, rel & 0xffff); \
REG_SET_SEEN(b); \
})
#define EMIT6_PCREL_RIL(op, target) \
({ \
int rel = (target - jit->prg) / 2; \
_EMIT6(op | rel >> 16, rel & 0xffff); \
})
#define _EMIT6_IMM(op, imm) \
({ \
unsigned int __imm = (imm); \
@ -475,8 +492,45 @@ static void bpf_jit_epilogue(struct bpf_jit *jit)
EMIT4(0xb9040000, REG_2, BPF_REG_0);
/* Restore registers */
save_restore_regs(jit, REGS_RESTORE);
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable) {
jit->r14_thunk_ip = jit->prg;
/* Generate __s390_indirect_jump_r14 thunk */
if (test_facility(35)) {
/* exrl %r0,.+10 */
EMIT6_PCREL_RIL(0xc6000000, jit->prg + 10);
} else {
/* larl %r1,.+14 */
EMIT6_PCREL_RILB(0xc0000000, REG_1, jit->prg + 14);
/* ex 0,0(%r1) */
EMIT4_DISP(0x44000000, REG_0, REG_1, 0);
}
/* j . */
EMIT4_PCREL(0xa7f40000, 0);
}
/* br %r14 */
_EMIT2(0x07fe);
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable &&
(jit->seen & SEEN_FUNC)) {
jit->r1_thunk_ip = jit->prg;
/* Generate __s390_indirect_jump_r1 thunk */
if (test_facility(35)) {
/* exrl %r0,.+10 */
EMIT6_PCREL_RIL(0xc6000000, jit->prg + 10);
/* j . */
EMIT4_PCREL(0xa7f40000, 0);
/* br %r1 */
_EMIT2(0x07f1);
} else {
/* larl %r1,.+14 */
EMIT6_PCREL_RILB(0xc0000000, REG_1, jit->prg + 14);
/* ex 0,S390_lowcore.br_r1_tampoline */
EMIT4_DISP(0x44000000, REG_0, REG_0,
offsetof(struct _lowcore, br_r1_trampoline));
/* j . */
EMIT4_PCREL(0xa7f40000, 0);
}
}
}
/*
@ -980,8 +1034,13 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i
/* lg %w1,<d(imm)>(%l) */
EMIT6_DISP_LH(0xe3000000, 0x0004, REG_W1, REG_0, REG_L,
EMIT_CONST_U64(func));
/* basr %r14,%w1 */
EMIT2(0x0d00, REG_14, REG_W1);
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable) {
/* brasl %r14,__s390_indirect_jump_r1 */
EMIT6_PCREL_RILB(0xc0050000, REG_14, jit->r1_thunk_ip);
} else {
/* basr %r14,%w1 */
EMIT2(0x0d00, REG_14, REG_W1);
}
/* lgr %b0,%r2: load return value into %b0 */
EMIT4(0xb9040000, BPF_REG_0, REG_2);
if (bpf_helper_changes_skb_data((void *)func)) {

26
arch/sh/include/asm/futex.h
View file

@ -10,20 +10,11 @@
/* XXX: UP variants, fix for SH-4A and SMP.. */
#include <asm/futex-irq.h>
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
switch (op) {
@ -49,17 +40,8 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

26
arch/sparc/include/asm/futex_64.h
View file

@ -29,22 +29,14 @@
: "r" (uaddr), "r" (oparg), "i" (-EFAULT) \
: "memory")
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret, tem;
if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))))
return -EFAULT;
if (unlikely((((unsigned long) uaddr) & 0x3UL)))
return -EINVAL;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
pagefault_disable();
switch (op) {
@ -69,17 +61,9 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

40
arch/tile/include/asm/futex.h
View file

@ -106,12 +106,9 @@
lock = __atomic_hashed_lock((int __force *)uaddr)
#endif
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int uninitialized_var(val), ret;
__futex_prolog();
@ -119,12 +116,6 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
/* The 32-bit futex code makes this assumption, so validate it here. */
BUILD_BUG_ON(sizeof(atomic_t) != sizeof(int));
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
switch (op) {
case FUTEX_OP_SET:
@ -148,30 +139,9 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
}
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (val == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (val != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (val < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (val >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (val <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (val > cmparg);
break;
default:
ret = -ENOSYS;
}
}
if (!ret)
*oval = val;
return ret;
}

6
arch/x86/boot/compressed/eboot.c
View file

@ -364,7 +364,8 @@ __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
if (status != EFI_SUCCESS)
goto free_struct;
memcpy(rom->romdata, pci->romimage, pci->romsize);
memcpy(rom->romdata, (void *)(unsigned long)pci->romimage,
pci->romsize);
return status;
free_struct:
@ -470,7 +471,8 @@ __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
if (status != EFI_SUCCESS)
goto free_struct;
memcpy(rom->romdata, pci->romimage, pci->romsize);
memcpy(rom->romdata, (void *)(unsigned long)pci->romimage,
pci->romsize);
return status;
free_struct:

3
arch/x86/entry/vdso/Makefile
View file

@ -166,7 +166,8 @@ quiet_cmd_vdso = VDSO $@
sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=both) \
$(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic $(LTO_CFLAGS)
$(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic $(LTO_CFLAGS) \
$(filter --target=% --gcc-toolchain=%,$(KBUILD_CFLAGS))
GCOV_PROFILE := n
#

40
arch/x86/include/asm/futex.h
View file

@ -41,20 +41,11 @@
"+m" (*uaddr), "=&r" (tem) \
: "r" (oparg), "i" (-EFAULT), "1" (0))
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret, tem;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
switch (op) {
@ -80,30 +71,9 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (oldval == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (oldval != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (oldval < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (oldval >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (oldval <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (oldval > cmparg);
break;
default:
ret = -ENOSYS;
}
}
if (!ret)
*oval = oldval;
return ret;
}

6
arch/x86/kernel/machine_kexec_32.c
View file

@ -71,12 +71,17 @@ static void load_segments(void)
static void machine_kexec_free_page_tables(struct kimage *image)
{
free_page((unsigned long)image->arch.pgd);
image->arch.pgd = NULL;
#ifdef CONFIG_X86_PAE
free_page((unsigned long)image->arch.pmd0);
image->arch.pmd0 = NULL;
free_page((unsigned long)image->arch.pmd1);
image->arch.pmd1 = NULL;
#endif
free_page((unsigned long)image->arch.pte0);
image->arch.pte0 = NULL;
free_page((unsigned long)image->arch.pte1);
image->arch.pte1 = NULL;
}
static int machine_kexec_alloc_page_tables(struct kimage *image)
@ -93,7 +98,6 @@ static int machine_kexec_alloc_page_tables(struct kimage *image)
!image->arch.pmd0 || !image->arch.pmd1 ||
#endif
!image->arch.pte0 || !image->arch.pte1) {
machine_kexec_free_page_tables(image);
return -ENOMEM;
}
return 0;

4
arch/x86/kernel/machine_kexec_64.c
View file

@ -37,8 +37,11 @@ static struct kexec_file_ops *kexec_file_loaders[] = {
static void free_transition_pgtable(struct kimage *image)
{
free_page((unsigned long)image->arch.pud);
image->arch.pud = NULL;
free_page((unsigned long)image->arch.pmd);
image->arch.pmd = NULL;
free_page((unsigned long)image->arch.pte);
image->arch.pte = NULL;
}
static int init_transition_pgtable(struct kimage *image, pgd_t *pgd)
@ -79,7 +82,6 @@ static int init_transition_pgtable(struct kimage *image, pgd_t *pgd)
set_pte(pte, pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL_EXEC));
return 0;
err:
free_transition_pgtable(image);
return result;
}

4
arch/x86/xen/mmu.c
View file

@ -1316,8 +1316,6 @@ void xen_flush_tlb_all(void)
struct mmuext_op *op;
struct multicall_space mcs;
trace_xen_mmu_flush_tlb_all(0);
preempt_disable();
mcs = xen_mc_entry(sizeof(*op));
@ -1335,8 +1333,6 @@ static void xen_flush_tlb(void)
struct mmuext_op *op;
struct multicall_space mcs;
trace_xen_mmu_flush_tlb(0);
preempt_disable();
mcs = xen_mc_entry(sizeof(*op));

27
arch/xtensa/include/asm/futex.h
View file

@ -44,18 +44,10 @@
: "r" (uaddr), "I" (-EFAULT), "r" (oparg) \
: "memory")
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
#if !XCHAL_HAVE_S32C1I
return -ENOSYS;
@ -89,19 +81,10 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
pagefault_enable();
if (ret)
return ret;
if (!ret)
*oval = oldval;
switch (cmp) {
case FUTEX_OP_CMP_EQ: return (oldval == cmparg);
case FUTEX_OP_CMP_NE: return (oldval != cmparg);
case FUTEX_OP_CMP_LT: return (oldval < cmparg);
case FUTEX_OP_CMP_GE: return (oldval >= cmparg);
case FUTEX_OP_CMP_LE: return (oldval <= cmparg);
case FUTEX_OP_CMP_GT: return (oldval > cmparg);
}
return -ENOSYS;
return ret;
}
static inline int

2
build.config.cuttlefish.x86_64
View file

@ -6,7 +6,7 @@ DEFCONFIG=x86_64_cuttlefish_defconfig
EXTRA_CMDS=''
KERNEL_DIR=common
POST_DEFCONFIG_CMDS="check_defconfig"
CLANG_PREBUILT_BIN=prebuilts/clang/host/linux-x86/clang-4630689/bin
CLANG_PREBUILT_BIN=prebuilts-master/clang/host/linux-x86/clang-r328903/bin
LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin
FILES="
arch/x86/boot/bzImage

34
drivers/cpufreq/intel_pstate.c
View file

@ -1361,6 +1361,11 @@ static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; }
static inline bool intel_pstate_has_acpi_ppc(void) { return false; }
#endif /* CONFIG_ACPI */
static const struct x86_cpu_id hwp_support_ids[] __initconst = {
{ X86_VENDOR_INTEL, 6, X86_MODEL_ANY, X86_FEATURE_HWP },
{}
};
static int __init intel_pstate_init(void)
{
int cpu, rc = 0;
@ -1370,17 +1375,16 @@ static int __init intel_pstate_init(void)
if (no_load)
return -ENODEV;
if (x86_match_cpu(hwp_support_ids) && !no_hwp) {
copy_cpu_funcs(&core_params.funcs);
hwp_active++;
goto hwp_cpu_matched;
}
id = x86_match_cpu(intel_pstate_cpu_ids);
if (!id)
return -ENODEV;
/*
* The Intel pstate driver will be ignored if the platform
* firmware has its own power management modes.
*/
if (intel_pstate_platform_pwr_mgmt_exists())
return -ENODEV;
cpu_def = (struct cpu_defaults *)id->driver_data;
copy_pid_params(&cpu_def->pid_policy);
@ -1389,17 +1393,20 @@ static int __init intel_pstate_init(void)
if (intel_pstate_msrs_not_valid())
return -ENODEV;
hwp_cpu_matched:
/*
* The Intel pstate driver will be ignored if the platform
* firmware has its own power management modes.
*/
if (intel_pstate_platform_pwr_mgmt_exists())
return -ENODEV;
pr_info("Intel P-state driver initializing.\n");
all_cpu_data = vzalloc(sizeof(void *) * num_possible_cpus());
if (!all_cpu_data)
return -ENOMEM;
if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp) {
pr_info("intel_pstate: HWP enabled\n");
hwp_active++;
}
if (!hwp_active && hwp_only)
goto out;
@ -1410,6 +1417,9 @@ static int __init intel_pstate_init(void)
intel_pstate_debug_expose_params();
intel_pstate_sysfs_expose_params();
if (hwp_active)
pr_info("intel_pstate: HWP enabled\n");
return rc;
out:
get_online_cpus();

2
drivers/cpufreq/powernv-cpufreq.c
View file

@ -592,7 +592,7 @@ static int __init powernv_cpufreq_init(void)
int rc = 0;
/* Don't probe on pseries (guest) platforms */
if (!firmware_has_feature(FW_FEATURE_OPALv3))
if (!firmware_has_feature(FW_FEATURE_OPAL))
return -ENODEV;
/* Discover pstates from device tree and init */

1
drivers/cpuidle/coupled.c
View file

@ -119,7 +119,6 @@ struct cpuidle_coupled {
#define CPUIDLE_COUPLED_NOT_IDLE (-1)
static DEFINE_MUTEX(cpuidle_coupled_lock);
static DEFINE_PER_CPU(struct call_single_data, cpuidle_coupled_poke_cb);
/*

2
drivers/cpuidle/cpuidle-powernv.c
View file

@ -282,7 +282,7 @@ static int powernv_idle_probe(void)
if (cpuidle_disable != IDLE_NO_OVERRIDE)
return -ENODEV;
if (firmware_has_feature(FW_FEATURE_OPALv3)) {
if (firmware_has_feature(FW_FEATURE_OPAL)) {
cpuidle_state_table = powernv_states;
/* Device tree can indicate more idle states */
max_idle_state = powernv_add_idle_states();

46
drivers/gpio/gpio-rcar.c
View file

@ -200,6 +200,48 @@ static int gpio_rcar_irq_set_wake(struct irq_data *d, unsigned int on)
return 0;
}
static void gpio_rcar_irq_bus_lock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
pm_runtime_get_sync(&p->pdev->dev);
}
static void gpio_rcar_irq_bus_sync_unlock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
pm_runtime_put(&p->pdev->dev);
}
static int gpio_rcar_irq_request_resources(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
int error;
error = pm_runtime_get_sync(&p->pdev->dev);
if (error < 0)
return error;
return 0;
}
static void gpio_rcar_irq_release_resources(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
pm_runtime_put(&p->pdev->dev);
}
static irqreturn_t gpio_rcar_irq_handler(int irq, void *dev_id)
{
struct gpio_rcar_priv *p = dev_id;
@ -460,6 +502,10 @@ static int gpio_rcar_probe(struct platform_device *pdev)
irq_chip->irq_unmask = gpio_rcar_irq_enable;
irq_chip->irq_set_type = gpio_rcar_irq_set_type;
irq_chip->irq_set_wake = gpio_rcar_irq_set_wake;
irq_chip->irq_bus_lock = gpio_rcar_irq_bus_lock;
irq_chip->irq_bus_sync_unlock = gpio_rcar_irq_bus_sync_unlock;
irq_chip->irq_request_resources = gpio_rcar_irq_request_resources;
irq_chip->irq_release_resources = gpio_rcar_irq_release_resources;
irq_chip->flags = IRQCHIP_SET_TYPE_MASKED | IRQCHIP_MASK_ON_SUSPEND;
ret = gpiochip_add(gpio_chip);

5
drivers/md/dm-bufio.c
View file

@ -818,7 +818,8 @@ static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client
* dm-bufio is resistant to allocation failures (it just keeps
* one buffer reserved in cases all the allocations fail).
* So set flags to not try too hard:
* GFP_NOIO: don't recurse into the I/O layer
* GFP_NOWAIT: don't wait; if we need to sleep we'll release our
* mutex and wait ourselves.
* __GFP_NORETRY: don't retry and rather return failure
* __GFP_NOMEMALLOC: don't use emergency reserves
* __GFP_NOWARN: don't print a warning in case of failure
@ -828,7 +829,7 @@ static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client
*/
while (1) {
if (dm_bufio_cache_size_latch != 1) {
b = alloc_buffer(c, GFP_NOIO | __GFP_NORETRY | __GFP_NOMEMALLOC | __GFP_NOWARN);
b = alloc_buffer(c, GFP_NOWAIT | __GFP_NORETRY | __GFP_NOMEMALLOC | __GFP_NOWARN);
if (b)
return b;
}

2
drivers/net/bonding/bond_alb.c
View file

@ -453,7 +453,7 @@ static void rlb_update_client(struct rlb_client_info *client_info)
{
int i;
if (!client_info->slave)
if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
return;
for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {

9
drivers/net/ethernet/broadcom/tg3.c
View file

@ -8722,14 +8722,15 @@ static void tg3_free_consistent(struct tg3 *tp)
tg3_mem_rx_release(tp);
tg3_mem_tx_release(tp);
/* Protect tg3_get_stats64() from reading freed tp->hw_stats. */
tg3_full_lock(tp, 0);
/* tp->hw_stats can be referenced safely:
* 1. under rtnl_lock
* 2. or under tp->lock if TG3_FLAG_INIT_COMPLETE is set.
*/
if (tp->hw_stats) {
dma_free_coherent(&tp->pdev->dev, sizeof(struct tg3_hw_stats),
tp->hw_stats, tp->stats_mapping);
tp->hw_stats = NULL;
}
tg3_full_unlock(tp);
}
/*
@ -14163,7 +14164,7 @@ static struct rtnl_link_stats64 *tg3_get_stats64(struct net_device *dev,
struct tg3 *tp = netdev_priv(dev);
spin_lock_bh(&tp->lock);
if (!tp->hw_stats) {
if (!tp->hw_stats || !tg3_flag(tp, INIT_COMPLETE)) {
*stats = tp->net_stats_prev;
spin_unlock_bh(&tp->lock);
return stats;

16
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
View file

@ -967,6 +967,22 @@ static int mlx4_en_set_coalesce(struct net_device *dev,
if (!coal->tx_max_coalesced_frames_irq)
return -EINVAL;
if (coal->tx_coalesce_usecs > MLX4_EN_MAX_COAL_TIME ||
coal->rx_coalesce_usecs > MLX4_EN_MAX_COAL_TIME ||
coal->rx_coalesce_usecs_low > MLX4_EN_MAX_COAL_TIME ||
coal->rx_coalesce_usecs_high > MLX4_EN_MAX_COAL_TIME) {
netdev_info(dev, "%s: maximum coalesce time supported is %d usecs\n",
__func__, MLX4_EN_MAX_COAL_TIME);
return -ERANGE;
}
if (coal->tx_max_coalesced_frames > MLX4_EN_MAX_COAL_PKTS ||
coal->rx_max_coalesced_frames > MLX4_EN_MAX_COAL_PKTS) {
netdev_info(dev, "%s: maximum coalesced frames supported is %d\n",
__func__, MLX4_EN_MAX_COAL_PKTS);
return -ERANGE;
}
priv->rx_frames = (coal->rx_max_coalesced_frames ==
MLX4_EN_AUTO_CONF) ?
MLX4_EN_RX_COAL_TARGET :

7
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View file

@ -140,6 +140,9 @@ enum {
#define MLX4_EN_TX_COAL_PKTS 16
#define MLX4_EN_TX_COAL_TIME 0x10
#define MLX4_EN_MAX_COAL_PKTS U16_MAX
#define MLX4_EN_MAX_COAL_TIME U16_MAX
#define MLX4_EN_RX_RATE_LOW 400000
#define MLX4_EN_RX_COAL_TIME_LOW 0
#define MLX4_EN_RX_RATE_HIGH 450000
@ -518,8 +521,8 @@ struct mlx4_en_priv {
u16 rx_usecs_low;
u32 pkt_rate_high;
u16 rx_usecs_high;
u16 sample_interval;
u16 adaptive_rx_coal;
u32 sample_interval;
u32 adaptive_rx_coal;
u32 msg_enable;
u32 loopback_ok;
u32 validate_loopback;

2
drivers/net/ethernet/realtek/8139too.c
View file

@ -2229,7 +2229,7 @@ static void rtl8139_poll_controller(struct net_device *dev)
struct rtl8139_private *tp = netdev_priv(dev);
const int irq = tp->pci_dev->irq;
disable_irq(irq);
disable_irq_nosync(irq);
rtl8139_interrupt(irq, dev);
enable_irq(irq);
}

3
drivers/net/ethernet/realtek/r8169.c
View file

@ -4832,6 +4832,9 @@ static void rtl_pll_power_down(struct rtl8169_private *tp)
static void rtl_pll_power_up(struct rtl8169_private *tp)
{
rtl_generic_op(tp, tp->pll_power_ops.up);
/* give MAC/PHY some time to resume */
msleep(20);
}
static void rtl_init_pll_power_ops(struct rtl8169_private *tp)

5
drivers/net/ethernet/sun/niu.c
View file

@ -3442,7 +3442,7 @@ static int niu_process_rx_pkt(struct napi_struct *napi, struct niu *np,
len = (val & RCR_ENTRY_L2_LEN) >>
RCR_ENTRY_L2_LEN_SHIFT;
len -= ETH_FCS_LEN;
append_size = len + ETH_HLEN + ETH_FCS_LEN;
addr = (val & RCR_ENTRY_PKT_BUF_ADDR) <<
RCR_ENTRY_PKT_BUF_ADDR_SHIFT;
@ -3452,7 +3452,6 @@ static int niu_process_rx_pkt(struct napi_struct *napi, struct niu *np,
RCR_ENTRY_PKTBUFSZ_SHIFT];
off = addr & ~PAGE_MASK;
append_size = rcr_size;
if (num_rcr == 1) {
int ptype;
@ -3465,7 +3464,7 @@ static int niu_process_rx_pkt(struct napi_struct *napi, struct niu *np,
else
skb_checksum_none_assert(skb);
} else if (!(val & RCR_ENTRY_MULTI))
append_size = len - skb->len;
append_size = append_size - skb->len;
niu_rx_skb_append(skb, page, off, append_size, rcr_size);
if ((page->index + rp->rbr_block_size) - rcr_size == addr) {

12
drivers/net/usb/qmi_wwan.c
View file

@ -855,6 +855,18 @@ static int qmi_wwan_probe(struct usb_interface *intf,
id->driver_info = (unsigned long)&qmi_wwan_info;
}
/* There are devices where the same interface number can be
* configured as different functions. We should only bind to
* vendor specific functions when matching on interface number
*/
if (id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER &&
desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) {
dev_dbg(&intf->dev,
"Rejecting interface number match for class %02x\n",
desc->bInterfaceClass);
return -ENODEV;
}
/* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");

12
drivers/s390/cio/qdio_setup.c
View file

@ -140,7 +140,7 @@ static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
int i;
for (i = 0; i < nr_queues; i++) {
q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
if (!q)
return -ENOMEM;
@ -456,7 +456,6 @@ int qdio_setup_irq(struct qdio_initialize *init_data)
{
struct ciw *ciw;
struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
int rc;
memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
@ -493,16 +492,14 @@ int qdio_setup_irq(struct qdio_initialize *init_data)
ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
if (!ciw) {
DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
rc = -EINVAL;
goto out_err;
return -EINVAL;
}
irq_ptr->equeue = *ciw;
ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
if (!ciw) {
DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
rc = -EINVAL;
goto out_err;
return -EINVAL;
}
irq_ptr->aqueue = *ciw;
@ -510,9 +507,6 @@ int qdio_setup_irq(struct qdio_initialize *init_data)
irq_ptr->orig_handler = init_data->cdev->handler;
init_data->cdev->handler = qdio_int_handler;
return 0;
out_err:
qdio_release_memory(irq_ptr);
return rc;
}
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,

23
drivers/s390/scsi/zfcp_dbf.c
View file

@ -3,7 +3,7 @@
*
* Debug traces for zfcp.
*
* Copyright IBM Corp. 2002, 2017
* Copyright IBM Corp. 2002, 2018
*/
#define KMSG_COMPONENT "zfcp"
@ -287,6 +287,27 @@ void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_trig_lock - trace event related to triggered recovery with lock
* @tag: identifier for event
* @adapter: adapter on which the erp_action should run
* @port: remote port involved in the erp_action
* @sdev: scsi device involved in the erp_action
* @want: wanted erp_action
* @need: required erp_action
*
* The adapter->erp_lock must not be held.
*/
void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,
struct zfcp_port *port, struct scsi_device *sdev,
u8 want, u8 need)
{
unsigned long flags;
read_lock_irqsave(&adapter->erp_lock, flags);
zfcp_dbf_rec_trig(tag, adapter, port, sdev, want, need);
read_unlock_irqrestore(&adapter->erp_lock, flags);
}
/**
* zfcp_dbf_rec_run_lvl - trace event related to running recovery

5
drivers/s390/scsi/zfcp_ext.h
View file

@ -3,7 +3,7 @@
*
* External function declarations.
*
* Copyright IBM Corp. 2002, 2016
* Copyright IBM Corp. 2002, 2018
*/
#ifndef ZFCP_EXT_H
@ -34,6 +34,9 @@ extern int zfcp_dbf_adapter_register(struct zfcp_adapter *);
extern void zfcp_dbf_adapter_unregister(struct zfcp_adapter *);
extern void zfcp_dbf_rec_trig(char *, struct zfcp_adapter *,
struct zfcp_port *, struct scsi_device *, u8, u8);
extern void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,
struct zfcp_port *port,
struct scsi_device *sdev, u8 want, u8 need);
extern void zfcp_dbf_rec_run(char *, struct zfcp_erp_action *);
extern void zfcp_dbf_rec_run_lvl(int level, char *tag,
struct zfcp_erp_action *erp);

14
drivers/s390/scsi/zfcp_scsi.c
View file

@ -3,7 +3,7 @@
*
* Interface to Linux SCSI midlayer.
*
* Copyright IBM Corp. 2002, 2017
* Copyright IBM Corp. 2002, 2018
*/
#define KMSG_COMPONENT "zfcp"
@ -616,9 +616,9 @@ static void zfcp_scsi_rport_register(struct zfcp_port *port)
ids.port_id = port->d_id;
ids.roles = FC_RPORT_ROLE_FCP_TARGET;
zfcp_dbf_rec_trig("scpaddy", port->adapter, port, NULL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
zfcp_dbf_rec_trig_lock("scpaddy", port->adapter, port, NULL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD,
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD);
rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
if (!rport) {
dev_err(&port->adapter->ccw_device->dev,
@ -640,9 +640,9 @@ static void zfcp_scsi_rport_block(struct zfcp_port *port)
struct fc_rport *rport = port->rport;
if (rport) {
zfcp_dbf_rec_trig("scpdely", port->adapter, port, NULL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
zfcp_dbf_rec_trig_lock("scpdely", port->adapter, port, NULL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL,
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL);
fc_remote_port_delete(rport);
port->rport = NULL;
}

33
drivers/scsi/libsas/sas_scsi_host.c
View file

@ -222,6 +222,7 @@ out_done:
static void sas_eh_finish_cmd(struct scsi_cmnd *cmd)
{
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host);
struct domain_device *dev = cmd_to_domain_dev(cmd);
struct sas_task *task = TO_SAS_TASK(cmd);
/* At this point, we only get called following an actual abort
@ -230,6 +231,14 @@ static void sas_eh_finish_cmd(struct scsi_cmnd *cmd)
*/
sas_end_task(cmd, task);
if (dev_is_sata(dev)) {
/* defer commands to libata so that libata EH can
* handle ata qcs correctly
*/
list_move_tail(&cmd->eh_entry, &sas_ha->eh_ata_q);
return;
}
/* now finish the command and move it on to the error
* handler done list, this also takes it off the
* error handler pending list.
@ -237,22 +246,6 @@ static void sas_eh_finish_cmd(struct scsi_cmnd *cmd)
scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q);
}
static void sas_eh_defer_cmd(struct scsi_cmnd *cmd)
{
struct domain_device *dev = cmd_to_domain_dev(cmd);
struct sas_ha_struct *ha = dev->port->ha;
struct sas_task *task = TO_SAS_TASK(cmd);
if (!dev_is_sata(dev)) {
sas_eh_finish_cmd(cmd);
return;
}
/* report the timeout to libata */
sas_end_task(cmd, task);
list_move_tail(&cmd->eh_entry, &ha->eh_ata_q);
}
static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd)
{
struct scsi_cmnd *cmd, *n;
@ -260,7 +253,7 @@ static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd
list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
if (cmd->device->sdev_target == my_cmd->device->sdev_target &&
cmd->device->lun == my_cmd->device->lun)
sas_eh_defer_cmd(cmd);
sas_eh_finish_cmd(cmd);
}
}
@ -622,12 +615,12 @@ static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *
case TASK_IS_DONE:
SAS_DPRINTK("%s: task 0x%p is done\n", __func__,
task);
sas_eh_defer_cmd(cmd);
sas_eh_finish_cmd(cmd);
continue;
case TASK_IS_ABORTED:
SAS_DPRINTK("%s: task 0x%p is aborted\n",
__func__, task);
sas_eh_defer_cmd(cmd);
sas_eh_finish_cmd(cmd);
continue;
case TASK_IS_AT_LU:
SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
@ -638,7 +631,7 @@ static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *
"recovered\n",
SAS_ADDR(task->dev),
cmd->device->lun);
sas_eh_defer_cmd(cmd);
sas_eh_finish_cmd(cmd);
sas_scsi_clear_queue_lu(work_q, cmd);
goto Again;
}

2
drivers/scsi/sg.c
View file

@ -1903,7 +1903,7 @@ retry:
num = (rem_sz > scatter_elem_sz_prev) ?
scatter_elem_sz_prev : rem_sz;
schp->pages[k] = alloc_pages(gfp_mask, order);
schp->pages[k] = alloc_pages(gfp_mask | __GFP_ZERO, order);
if (!schp->pages[k])
goto out;

2
drivers/spi/spi-pxa2xx.h
View file

@ -38,7 +38,7 @@ struct driver_data {
/* SSP register addresses */
void __iomem *ioaddr;
u32 ssdr_physical;
phys_addr_t ssdr_physical;
/* SSP masks*/
u32 dma_cr1;

2
drivers/usb/usbip/stub.h
View file

@ -88,6 +88,7 @@ struct bus_id_priv {
struct stub_device *sdev;
struct usb_device *udev;
char shutdown_busid;
spinlock_t busid_lock;
};
/* stub_priv is allocated from stub_priv_cache */
@ -98,6 +99,7 @@ extern struct usb_device_driver stub_driver;
/* stub_main.c */
struct bus_id_priv *get_busid_priv(const char *busid);
void put_busid_priv(struct bus_id_priv *bid);
int del_match_busid(char *busid);
void stub_device_cleanup_urbs(struct stub_device *sdev);

43
drivers/usb/usbip/stub_dev.c
View file

@ -314,9 +314,9 @@ static int stub_probe(struct usb_device *udev)
struct stub_device *sdev = NULL;
const char *udev_busid = dev_name(&udev->dev);
struct bus_id_priv *busid_priv;
int rc;
int rc = 0;
dev_dbg(&udev->dev, "Enter\n");
dev_dbg(&udev->dev, "Enter probe\n");
/* check we should claim or not by busid_table */
busid_priv = get_busid_priv(udev_busid);
@ -331,13 +331,15 @@ static int stub_probe(struct usb_device *udev)
* other matched drivers by the driver core.
* See driver_probe_device() in driver/base/dd.c
*/
return -ENODEV;
rc = -ENODEV;
goto call_put_busid_priv;
}
if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) {
dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n",
udev_busid);
return -ENODEV;
rc = -ENODEV;
goto call_put_busid_priv;
}
if (!strcmp(udev->bus->bus_name, "vhci_hcd")) {
@ -345,13 +347,16 @@ static int stub_probe(struct usb_device *udev)
"%s is attached on vhci_hcd... skip!\n",
udev_busid);
return -ENODEV;
rc = -ENODEV;
goto call_put_busid_priv;
}
/* ok, this is my device */
sdev = stub_device_alloc(udev);
if (!sdev)
return -ENOMEM;
if (!sdev) {
rc = -ENOMEM;
goto call_put_busid_priv;
}
dev_info(&udev->dev,
"usbip-host: register new device (bus %u dev %u)\n",
@ -383,7 +388,9 @@ static int stub_probe(struct usb_device *udev)
}
busid_priv->status = STUB_BUSID_ALLOC;
return 0;
rc = 0;
goto call_put_busid_priv;
err_files:
usb_hub_release_port(udev->parent, udev->portnum,
(struct usb_dev_state *) udev);
@ -394,6 +401,9 @@ err_port:
busid_priv->sdev = NULL;
stub_device_free(sdev);
call_put_busid_priv:
put_busid_priv(busid_priv);
return rc;
}
@ -419,7 +429,7 @@ static void stub_disconnect(struct usb_device *udev)
struct bus_id_priv *busid_priv;
int rc;
dev_dbg(&udev->dev, "Enter\n");
dev_dbg(&udev->dev, "Enter disconnect\n");
busid_priv = get_busid_priv(udev_busid);
if (!busid_priv) {
@ -432,7 +442,7 @@ static void stub_disconnect(struct usb_device *udev)
/* get stub_device */
if (!sdev) {
dev_err(&udev->dev, "could not get device");
return;
goto call_put_busid_priv;
}
dev_set_drvdata(&udev->dev, NULL);
@ -447,12 +457,12 @@ static void stub_disconnect(struct usb_device *udev)
(struct usb_dev_state *) udev);
if (rc) {
dev_dbg(&udev->dev, "unable to release port\n");
return;
goto call_put_busid_priv;
}
/* If usb reset is called from event handler */
if (busid_priv->sdev->ud.eh == current)
return;
goto call_put_busid_priv;
/* shutdown the current connection */
shutdown_busid(busid_priv);
@ -463,12 +473,11 @@ static void stub_disconnect(struct usb_device *udev)
busid_priv->sdev = NULL;
stub_device_free(sdev);
if (busid_priv->status == STUB_BUSID_ALLOC) {
if (busid_priv->status == STUB_BUSID_ALLOC)
busid_priv->status = STUB_BUSID_ADDED;
} else {
busid_priv->status = STUB_BUSID_OTHER;
del_match_busid((char *)udev_busid);
}
call_put_busid_priv:
put_busid_priv(busid_priv);
}
#ifdef CONFIG_PM

105
drivers/usb/usbip/stub_main.c
View file

@ -28,6 +28,7 @@
#define DRIVER_DESC "USB/IP Host Driver"
struct kmem_cache *stub_priv_cache;
/*
* busid_tables defines matching busids that usbip can grab. A user can change
* dynamically what device is locally used and what device is exported to a
@ -39,6 +40,8 @@ static spinlock_t busid_table_lock;
static void init_busid_table(void)
{
int i;
/*
* This also sets the bus_table[i].status to
* STUB_BUSID_OTHER, which is 0.
@ -46,6 +49,9 @@ static void init_busid_table(void)
memset(busid_table, 0, sizeof(busid_table));
spin_lock_init(&busid_table_lock);
for (i = 0; i < MAX_BUSID; i++)
spin_lock_init(&busid_table[i].busid_lock);
}
/*
@ -57,15 +63,20 @@ static int get_busid_idx(const char *busid)
int i;
int idx = -1;
for (i = 0; i < MAX_BUSID; i++)
for (i = 0; i < MAX_BUSID; i++) {
spin_lock(&busid_table[i].busid_lock);
if (busid_table[i].name[0])
if (!strncmp(busid_table[i].name, busid, BUSID_SIZE)) {
idx = i;
spin_unlock(&busid_table[i].busid_lock);
break;
}
spin_unlock(&busid_table[i].busid_lock);
}
return idx;
}
/* Returns holding busid_lock. Should call put_busid_priv() to unlock */
struct bus_id_priv *get_busid_priv(const char *busid)
{
int idx;
@ -73,13 +84,22 @@ struct bus_id_priv *get_busid_priv(const char *busid)
spin_lock(&busid_table_lock);
idx = get_busid_idx(busid);
if (idx >= 0)
if (idx >= 0) {
bid = &(busid_table[idx]);
/* get busid_lock before returning */
spin_lock(&bid->busid_lock);
}
spin_unlock(&busid_table_lock);
return bid;
}
void put_busid_priv(struct bus_id_priv *bid)
{
if (bid)
spin_unlock(&bid->busid_lock);
}
static int add_match_busid(char *busid)
{
int i;
@ -92,15 +112,19 @@ static int add_match_busid(char *busid)
goto out;
}
for (i = 0; i < MAX_BUSID; i++)
for (i = 0; i < MAX_BUSID; i++) {
spin_lock(&busid_table[i].busid_lock);
if (!busid_table[i].name[0]) {
strlcpy(busid_table[i].name, busid, BUSID_SIZE);
if ((busid_table[i].status != STUB_BUSID_ALLOC) &&
(busid_table[i].status != STUB_BUSID_REMOV))
busid_table[i].status = STUB_BUSID_ADDED;
ret = 0;
spin_unlock(&busid_table[i].busid_lock);
break;
}
spin_unlock(&busid_table[i].busid_lock);
}
out:
spin_unlock(&busid_table_lock);
@ -121,6 +145,8 @@ int del_match_busid(char *busid)
/* found */
ret = 0;
spin_lock(&busid_table[idx].busid_lock);
if (busid_table[idx].status == STUB_BUSID_OTHER)
memset(busid_table[idx].name, 0, BUSID_SIZE);
@ -128,6 +154,7 @@ int del_match_busid(char *busid)
(busid_table[idx].status != STUB_BUSID_ADDED))
busid_table[idx].status = STUB_BUSID_REMOV;
spin_unlock(&busid_table[idx].busid_lock);
out:
spin_unlock(&busid_table_lock);
@ -140,9 +167,12 @@ static ssize_t show_match_busid(struct device_driver *drv, char *buf)
char *out = buf;
spin_lock(&busid_table_lock);
for (i = 0; i < MAX_BUSID; i++)
for (i = 0; i < MAX_BUSID; i++) {
spin_lock(&busid_table[i].busid_lock);
if (busid_table[i].name[0])
out += sprintf(out, "%s ", busid_table[i].name);
spin_unlock(&busid_table[i].busid_lock);
}
spin_unlock(&busid_table_lock);
out += sprintf(out, "\n");
@ -184,6 +214,51 @@ static ssize_t store_match_busid(struct device_driver *dev, const char *buf,
static DRIVER_ATTR(match_busid, S_IRUSR | S_IWUSR, show_match_busid,
store_match_busid);
static int do_rebind(char *busid, struct bus_id_priv *busid_priv)
{
int ret;
/* device_attach() callers should hold parent lock for USB */
if (busid_priv->udev->dev.parent)
device_lock(busid_priv->udev->dev.parent);
ret = device_attach(&busid_priv->udev->dev);
if (busid_priv->udev->dev.parent)
device_unlock(busid_priv->udev->dev.parent);
if (ret < 0) {
dev_err(&busid_priv->udev->dev, "rebind failed\n");
return ret;
}
return 0;
}
static void stub_device_rebind(void)
{
#if IS_MODULE(CONFIG_USBIP_HOST)
struct bus_id_priv *busid_priv;
int i;
/* update status to STUB_BUSID_OTHER so probe ignores the device */
spin_lock(&busid_table_lock);
for (i = 0; i < MAX_BUSID; i++) {
if (busid_table[i].name[0] &&
busid_table[i].shutdown_busid) {
busid_priv = &(busid_table[i]);
busid_priv->status = STUB_BUSID_OTHER;
}
}
spin_unlock(&busid_table_lock);
/* now run rebind - no need to hold locks. driver files are removed */
for (i = 0; i < MAX_BUSID; i++) {
if (busid_table[i].name[0] &&
busid_table[i].shutdown_busid) {
busid_priv = &(busid_table[i]);
do_rebind(busid_table[i].name, busid_priv);
}
}
#endif
}
static ssize_t rebind_store(struct device_driver *dev, const char *buf,
size_t count)
{
@ -201,16 +276,17 @@ static ssize_t rebind_store(struct device_driver *dev, const char *buf,
if (!bid)
return -ENODEV;
/* device_attach() callers should hold parent lock for USB */
if (bid->udev->dev.parent)
device_lock(bid->udev->dev.parent);
ret = device_attach(&bid->udev->dev);
if (bid->udev->dev.parent)
device_unlock(bid->udev->dev.parent);
if (ret < 0) {
dev_err(&bid->udev->dev, "rebind failed\n");
/* mark the device for deletion so probe ignores it during rescan */
bid->status = STUB_BUSID_OTHER;
/* release the busid lock */
put_busid_priv(bid);
ret = do_rebind((char *) buf, bid);
if (ret < 0)
return ret;
}
/* delete device from busid_table */
del_match_busid((char *) buf);
return count;
}
@ -333,6 +409,9 @@ static void __exit usbip_host_exit(void)
*/
usb_deregister_device_driver(&stub_driver);
/* initiate scan to attach devices */
stub_device_rebind();
kmem_cache_destroy(stub_priv_cache);
}

6
fs/btrfs/ctree.c
View file

@ -2497,10 +2497,8 @@ read_block_for_search(struct btrfs_trans_handle *trans,
if (p->reada)
reada_for_search(root, p, level, slot, key->objectid);
btrfs_release_path(p);
ret = -EAGAIN;
tmp = read_tree_block(root, blocknr, 0);
tmp = read_tree_block(root, blocknr, gen);
if (!IS_ERR(tmp)) {
/*
* If the read above didn't mark this buffer up to date,
@ -2512,6 +2510,8 @@ read_block_for_search(struct btrfs_trans_handle *trans,
ret = -EIO;
free_extent_buffer(tmp);
}
btrfs_release_path(p);
return ret;
}

7
fs/btrfs/tree-log.c
View file

@ -4568,6 +4568,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
u64 logged_isize = 0;
bool need_log_inode_item = true;
bool xattrs_logged = false;
path = btrfs_alloc_path();
if (!path)
@ -4808,6 +4809,7 @@ next_slot:
err = btrfs_log_all_xattrs(trans, root, inode, path, dst_path);
if (err)
goto out_unlock;
xattrs_logged = true;
if (max_key.type >= BTRFS_EXTENT_DATA_KEY && !fast_search) {
btrfs_release_path(path);
btrfs_release_path(dst_path);
@ -4820,6 +4822,11 @@ log_extents:
btrfs_release_path(dst_path);
if (need_log_inode_item) {
err = log_inode_item(trans, log, dst_path, inode);
if (!err && !xattrs_logged) {
err = btrfs_log_all_xattrs(trans, root, inode, path,
dst_path);
btrfs_release_path(path);
}
if (err)
goto out_unlock;
}

9
fs/btrfs/volumes.c
View file

@ -3850,6 +3850,15 @@ int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info)
return 0;
}
/*
* A ro->rw remount sequence should continue with the paused balance
* regardless of who pauses it, system or the user as of now, so set
* the resume flag.
*/
spin_lock(&fs_info->balance_lock);
fs_info->balance_ctl->flags |= BTRFS_BALANCE_RESUME;
spin_unlock(&fs_info->balance_lock);
tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance");
return PTR_ERR_OR_ZERO(tsk);
}

4
fs/crypto/fscrypt_private.h
View file

@ -101,6 +101,10 @@ static inline bool fscrypt_valid_enc_modes(u32 contents_mode,
filenames_mode == FS_ENCRYPTION_MODE_AES_256_CTS)
return true;
if (contents_mode == FS_ENCRYPTION_MODE_SPECK128_256_XTS &&
filenames_mode == FS_ENCRYPTION_MODE_SPECK128_256_CTS)
return true;
return false;
}

2
fs/crypto/keyinfo.c
View file

@ -134,6 +134,8 @@ static const struct {
FS_AES_128_CBC_KEY_SIZE },
[FS_ENCRYPTION_MODE_AES_128_CTS] = { "cts(cbc(aes))",
FS_AES_128_CTS_KEY_SIZE },
[FS_ENCRYPTION_MODE_SPECK128_256_XTS] = { "xts(speck128)", 64 },
[FS_ENCRYPTION_MODE_SPECK128_256_CTS] = { "cts(cbc(speck128))", 32 },
};
static int determine_cipher_type(struct fscrypt_info *ci, struct inode *inode,

10
fs/ext2/inode.c
View file

@ -1175,21 +1175,11 @@ do_indirects:
static void ext2_truncate_blocks(struct inode *inode, loff_t offset)
{
/*
* XXX: it seems like a bug here that we don't allow
* IS_APPEND inode to have blocks-past-i_size trimmed off.
* review and fix this.
*
* Also would be nice to be able to handle IO errors and such,
* but that's probably too much to ask.
*/
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
S_ISLNK(inode->i_mode)))
return;
if (ext2_inode_is_fast_symlink(inode))
return;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
dax_sem_down_write(EXT2_I(inode));
__ext2_truncate_blocks(inode, offset);

14
fs/ext4/crypto.c
View file

@ -455,10 +455,18 @@ errout:
return err;
}
bool ext4_valid_contents_enc_mode(uint32_t mode)
bool ext4_valid_enc_modes(uint32_t contents_mode, uint32_t filenames_mode)
{
return (mode == EXT4_ENCRYPTION_MODE_AES_256_XTS ||
mode == EXT4_ENCRYPTION_MODE_PRIVATE);
if (contents_mode == EXT4_ENCRYPTION_MODE_AES_256_XTS ||
contents_mode == EXT4_ENCRYPTION_MODE_PRIVATE) {
return (filenames_mode == EXT4_ENCRYPTION_MODE_AES_256_CTS ||
filenames_mode == EXT4_ENCRYPTION_MODE_AES_256_HEH);
}
if (contents_mode == EXT4_ENCRYPTION_MODE_SPECK128_256_XTS)
return filenames_mode == EXT4_ENCRYPTION_MODE_SPECK128_256_CTS;
return false;
}
/**

6
fs/ext4/crypto_fname.c
View file

@ -42,12 +42,6 @@ static void ext4_dir_crypt_complete(struct crypto_async_request *req, int res)
complete(&ecr->completion);
}
bool ext4_valid_filenames_enc_mode(uint32_t mode)
{
return (mode == EXT4_ENCRYPTION_MODE_AES_256_CTS ||
mode == EXT4_ENCRYPTION_MODE_AES_256_HEH);
}
static unsigned max_name_len(struct inode *inode)
{
return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize :

6
fs/ext4/crypto_key.c
View file

@ -278,6 +278,12 @@ retry:
case EXT4_ENCRYPTION_MODE_AES_256_HEH:
cipher_str = "heh(aes)";
break;
case EXT4_ENCRYPTION_MODE_SPECK128_256_XTS:
cipher_str = "xts(speck128)";
break;
case EXT4_ENCRYPTION_MODE_SPECK128_256_CTS:
cipher_str = "cts(cbc(speck128))";
break;
default:
printk_once(KERN_WARNING
"ext4: unsupported key mode %d (ino %u)\n",

14
fs/ext4/crypto_policy.c
View file

@ -60,16 +60,12 @@ static int ext4_create_encryption_context_from_policy(
ctx.format = EXT4_ENCRYPTION_CONTEXT_FORMAT_V1;
memcpy(ctx.master_key_descriptor, policy->master_key_descriptor,
EXT4_KEY_DESCRIPTOR_SIZE);
if (!ext4_valid_contents_enc_mode(policy->contents_encryption_mode)) {
if (!ext4_valid_enc_modes(policy->contents_encryption_mode,
policy->filenames_encryption_mode)) {
printk(KERN_WARNING
"%s: Invalid contents encryption mode %d\n", __func__,
policy->contents_encryption_mode);
return -EINVAL;
}
if (!ext4_valid_filenames_enc_mode(policy->filenames_encryption_mode)) {
printk(KERN_WARNING
"%s: Invalid filenames encryption mode %d\n", __func__,
policy->filenames_encryption_mode);
"%s: Invalid encryption modes (contents %d, filenames %d)\n",
__func__, policy->contents_encryption_mode,
policy->filenames_encryption_mode);
return -EINVAL;
}
if (policy->flags & ~EXT4_POLICY_FLAGS_VALID)

5
fs/ext4/ext4.h
View file

@ -589,6 +589,8 @@ enum {
#define EXT4_ENCRYPTION_MODE_AES_256_GCM 2
#define EXT4_ENCRYPTION_MODE_AES_256_CBC 3
#define EXT4_ENCRYPTION_MODE_AES_256_CTS 4
#define EXT4_ENCRYPTION_MODE_SPECK128_256_XTS 7
#define EXT4_ENCRYPTION_MODE_SPECK128_256_CTS 8
#define EXT4_ENCRYPTION_MODE_PRIVATE 127
#define EXT4_ENCRYPTION_MODE_AES_256_HEH 126
@ -2260,7 +2262,7 @@ int ext4_get_policy(struct inode *inode,
/* crypto.c */
extern struct kmem_cache *ext4_crypt_info_cachep;
bool ext4_valid_contents_enc_mode(uint32_t mode);
bool ext4_valid_enc_modes(uint32_t contents_mode, uint32_t filenames_mode);
uint32_t ext4_validate_encryption_key_size(uint32_t mode, uint32_t size);
extern struct workqueue_struct *ext4_read_workqueue;
struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode,
@ -2292,7 +2294,6 @@ static inline int ext4_sb_has_crypto(struct super_block *sb)
#endif
/* crypto_fname.c */
bool ext4_valid_filenames_enc_mode(uint32_t mode);
u32 ext4_fname_crypto_round_up(u32 size, u32 blksize);
unsigned ext4_fname_encrypted_size(struct inode *inode, u32 ilen);
int ext4_fname_crypto_alloc_buffer(struct inode *inode,

4
fs/ext4/ext4_crypto.h
View file

@ -131,6 +131,10 @@ static inline int ext4_encryption_key_size(int mode)
return EXT4_AES_256_CTS_KEY_SIZE;
case EXT4_ENCRYPTION_MODE_AES_256_HEH:
return EXT4_AES_256_HEH_KEY_SIZE;
case EXT4_ENCRYPTION_MODE_SPECK128_256_XTS:
return 64;
case EXT4_ENCRYPTION_MODE_SPECK128_256_CTS:
return 32;
default:
BUG();
}

1
fs/hfsplus/super.c
View file

@ -585,6 +585,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
return 0;
out_put_hidden_dir:
cancel_delayed_work_sync(&sbi->sync_work);
iput(sbi->hidden_dir);
out_put_root:
dput(sb->s_root);

2
fs/lockd/svc.c
View file

@ -271,6 +271,8 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
if (ln->nlmsvc_users) {
if (--ln->nlmsvc_users == 0) {
nlm_shutdown_hosts_net(net);
cancel_delayed_work_sync(&ln->grace_period_end);
locks_end_grace(&ln->lockd_manager);
svc_shutdown_net(serv, net);
dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net);
}

3
fs/pipe.c
View file

@ -616,6 +616,9 @@ struct pipe_inode_info *alloc_pipe_info(void)
unsigned long pipe_bufs = PIPE_DEF_BUFFERS;
struct user_struct *user = get_current_user();
if (pipe_bufs * PAGE_SIZE > pipe_max_size && !capable(CAP_SYS_RESOURCE))
pipe_bufs = pipe_max_size >> PAGE_SHIFT;
if (!too_many_pipe_buffers_hard(user)) {
if (too_many_pipe_buffers_soft(user))
pipe_bufs = 1;

15
fs/proc/base.c
View file

@ -954,6 +954,7 @@ static ssize_t environ_read(struct file *file, char __user *buf,
unsigned long src = *ppos;
int ret = 0;
struct mm_struct *mm = file->private_data;
unsigned long env_start, env_end;
/* Ensure the process spawned far enough to have an environment. */
if (!mm || !mm->env_end)
@ -966,19 +967,25 @@ static ssize_t environ_read(struct file *file, char __user *buf,
ret = 0;
if (!atomic_inc_not_zero(&mm->mm_users))
goto free;
down_read(&mm->mmap_sem);
env_start = mm->env_start;
env_end = mm->env_end;
up_read(&mm->mmap_sem);
while (count > 0) {
size_t this_len, max_len;
int retval;
if (src >= (mm->env_end - mm->env_start))
if (src >= (env_end - env_start))
break;
this_len = mm->env_end - (mm->env_start + src);
this_len = env_end - (env_start + src);
max_len = min_t(size_t, PAGE_SIZE, count);
this_len = min(max_len, this_len);
retval = access_remote_vm(mm, (mm->env_start + src),
retval = access_remote_vm(mm, (env_start + src),
page, this_len, 0);
if (retval <= 0) {
@ -3384,7 +3391,7 @@ int proc_pid_readdir(struct file *file, struct dir_context *ctx)
* used for the node /proc/<pid>/task/<tid>/comm.
* It bypasses generic permission checks in the case where a task of the same
* task group attempts to access the node.
* The rational behind this is that glibc and bionic access this node for
* The rationale behind this is that glibc and bionic access this node for
* cross thread naming (pthread_set/getname_np(!self)). However, if
* PR_SET_DUMPABLE gets set to 0 this node among others becomes uid=0 gid=0,
* which locks out the cross thread naming implementation.

5
fs/proc/meminfo.c
View file

@ -57,11 +57,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
/*
* Estimate the amount of memory available for userspace allocations,
* without causing swapping.
*
* Free memory cannot be taken below the low watermark, before the
* system starts swapping.
*/
available = i.freeram - wmark_low;
available = i.freeram - totalreserve_pages;
/*
* Not all the page cache can be freed, otherwise the system will

2
fs/proc/uid.c
View file

@ -174,7 +174,7 @@ static int proc_uid_base_readdir(struct file *file, struct dir_context *ctx)
return 0;
for (u = uid_base_stuff + (ctx->pos - 2);
u <= uid_base_stuff + nents - 1; u++) {
u < uid_base_stuff + nents; u++) {
if (!proc_fill_cache(file, ctx, u->name, u->len,
proc_uident_instantiate, NULL, u))
break;

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