* refs/heads/tmp-c71ad0f:
BACKPORT: arm64: dts: juno: fix cluster sleep state entry latency on all SoC versions
staging: android: ashmem: lseek failed due to no FMODE_LSEEK.
ANDROID: sdcardfs: update module info
ANDROID: sdcardfs: use d_splice_alias
ANDROID: sdcardfs: add read_iter/write_iter opeations
ANDROID: sdcardfs: fix ->llseek to update upper and lower offset
ANDROID: sdcardfs: copy lower inode attributes in ->ioctl
ANDROID: sdcardfs: remove unnecessary call to do_munmap
Merge 4.4.59 into android-4.4
UPSTREAM: ipv6 addrconf: implement RFC7559 router solicitation backoff
android: base-cfg: enable CONFIG_INET_DIAG_DESTROY
ANDROID: android-base.cfg: add CONFIG_MODULES option
ANDROID: android-base.cfg: add CONFIG_IKCONFIG option
ANDROID: android-base.cfg: properly sort the file
ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.
ANDROID: sort android-recommended.cfg
UPSTREAM: config/android: Remove CONFIG_IPV6_PRIVACY
UPSTREAM: config: android: set SELinux as default security mode
config: android: move device mapper options to recommended
ANDROID: ARM64: Allow to choose appended kernel image
UPSTREAM: arm64: vdso: constify vm_special_mapping used for aarch32 vectors page
UPSTREAM: arm64: vdso: add __init section marker to alloc_vectors_page
UPSTREAM: ARM: 8597/1: VDSO: put RO and RO after init objects into proper sections
UPSTREAM: arm64: Add support for CLOCK_MONOTONIC_RAW in clock_gettime() vDSO
UPSTREAM: arm64: Refactor vDSO time functions
UPSTREAM: arm64: fix vdso-offsets.h dependency
UPSTREAM: kbuild: drop FORCE from PHONY targets
UPSTREAM: mm: add PHYS_PFN, use it in __phys_to_pfn()
UPSTREAM: ARM: 8476/1: VDSO: use PTR_ERR_OR_ZERO for vma check
Linux 4.4.58
crypto: algif_hash - avoid zero-sized array
fbcon: Fix vc attr at deinit
serial: 8250_pci: Detach low-level driver during PCI error recovery
ACPI / blacklist: Make Dell Latitude 3350 ethernet work
ACPI / blacklist: add _REV quirks for Dell Precision 5520 and 3520
uvcvideo: uvc_scan_fallback() for webcams with broken chain
s390/zcrypt: Introduce CEX6 toleration
block: allow WRITE_SAME commands with the SG_IO ioctl
vfio/spapr: Postpone allocation of userspace version of TCE table
PCI: Do any VF BAR updates before enabling the BARs
PCI: Ignore BAR updates on virtual functions
PCI: Update BARs using property bits appropriate for type
PCI: Don't update VF BARs while VF memory space is enabled
PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE
PCI: Add comments about ROM BAR updating
PCI: Remove pci_resource_bar() and pci_iov_resource_bar()
PCI: Separate VF BAR updates from standard BAR updates
x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
igb: add i211 to i210 PHY workaround
igb: Workaround for igb i210 firmware issue
xen: do not re-use pirq number cached in pci device msi msg data
xfs: clear _XBF_PAGES from buffers when readahead page
USB: usbtmc: add missing endpoint sanity check
nl80211: fix dumpit error path RTNL deadlocks
xfs: fix up xfs_swap_extent_forks inline extent handling
xfs: don't allow di_size with high bit set
libceph: don't set weight to IN when OSD is destroyed
raid10: increment write counter after bio is split
cpufreq: Restore policy min/max limits on CPU online
ARM: dts: at91: sama5d2: add dma properties to UART nodes
ARM: at91: pm: cpu_idle: switch DDR to power-down mode
iommu/vt-d: Fix NULL pointer dereference in device_to_iommu
xen/acpi: upload PM state from init-domain to Xen
mmc: sdhci: Do not disable interrupts while waiting for clock
ext4: mark inode dirty after converting inline directory
parport: fix attempt to write duplicate procfiles
iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3
iio: adc: ti_am335x_adc: fix fifo overrun recovery
mmc: ushc: fix NULL-deref at probe
uwb: hwa-rc: fix NULL-deref at probe
uwb: i1480-dfu: fix NULL-deref at probe
usb: hub: Fix crash after failure to read BOS descriptor
usb: musb: cppi41: don't check early-TX-interrupt for Isoch transfer
USB: wusbcore: fix NULL-deref at probe
USB: idmouse: fix NULL-deref at probe
USB: lvtest: fix NULL-deref at probe
USB: uss720: fix NULL-deref at probe
usb-core: Add LINEAR_FRAME_INTR_BINTERVAL USB quirk
usb: gadget: f_uvc: Fix SuperSpeed companion descriptor's wBytesPerInterval
ACM gadget: fix endianness in notifications
USB: serial: qcserial: add Dell DW5811e
USB: serial: option: add Quectel UC15, UC20, EC21, and EC25 modems
ALSA: hda - Adding a group of pin definition to fix headset problem
ALSA: ctxfi: Fix the incorrect check of dma_set_mask() call
ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()
Input: sur40 - validate number of endpoints before using them
Input: kbtab - validate number of endpoints before using them
Input: cm109 - validate number of endpoints before using them
Input: yealink - validate number of endpoints before using them
Input: hanwang - validate number of endpoints before using them
Input: ims-pcu - validate number of endpoints before using them
Input: iforce - validate number of endpoints before using them
Input: i8042 - add noloop quirk for Dell Embedded Box PC 3000
Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw
tcp: initialize icsk_ack.lrcvtime at session start time
socket, bpf: fix sk_filter use after free in sk_clone_lock
ipv4: provide stronger user input validation in nl_fib_input()
net: bcmgenet: remove bcmgenet_internal_phy_setup()
net/mlx5e: Count LRO packets correctly
net/mlx5: Increase number of max QPs in default profile
net: unix: properly re-increment inflight counter of GC discarded candidates
amd-xgbe: Fix jumbo MTU processing on newer hardware
net: properly release sk_frag.page
net: bcmgenet: Do not suspend PHY if Wake-on-LAN is enabled
net/openvswitch: Set the ipv6 source tunnel key address attribute correctly
Linux 4.4.57
ext4: fix fencepost in s_first_meta_bg validation
percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages
gfs2: Avoid alignment hole in struct lm_lockname
isdn/gigaset: fix NULL-deref at probe
target: Fix VERIFY_16 handling in sbc_parse_cdb
scsi: libiscsi: add lock around task lists to fix list corruption regression
scsi: lpfc: Add shutdown method for kexec
target/pscsi: Fix TYPE_TAPE + TYPE_MEDIMUM_CHANGER export
md/raid1/10: fix potential deadlock
powerpc/boot: Fix zImage TOC alignment
cpufreq: Fix and clean up show_cpuinfo_cur_freq()
perf/core: Fix event inheritance on fork()
give up on gcc ilog2() constant optimizations
kernek/fork.c: allocate idle task for a CPU always on its local node
hv_netvsc: use skb_get_hash() instead of a homegrown implementation
tpm_tis: Use devm_free_irq not free_irq
drm/amdgpu: add missing irq.h include
s390/pci: fix use after free in dma_init
KVM: PPC: Book3S PR: Fix illegal opcode emulation
xen/qspinlock: Don't kick CPU if IRQ is not initialized
Drivers: hv: avoid vfree() on crash
Drivers: hv: balloon: don't crash when memory is added in non-sorted order
pinctrl: cherryview: Do not mask all interrupts in probe
ACPI / video: skip evaluating _DOD when it does not exist
cxlflash: Increase cmd_per_lun for better throughput
crypto: mcryptd - Fix load failure
crypto: cryptd - Assign statesize properly
crypto: ghash-clmulni - Fix load failure
USB: don't free bandwidth_mutex too early
usb: core: hub: hub_port_init lock controller instead of bus
ANDROID: sdcardfs: Fix style issues in macros
ANDROID: sdcardfs: Use seq_puts over seq_printf
ANDROID: sdcardfs: Use to kstrout
ANDROID: sdcardfs: Use pr_[...] instead of printk
ANDROID: sdcardfs: remove unneeded null check
ANDROID: sdcardfs: Fix style issues with comments
ANDROID: sdcardfs: Fix formatting
ANDROID: sdcardfs: correct order of descriptors
fix the deadlock in xt_qtaguid when enable DDEBUG
net: ipv6: Add sysctl for minimum prefix len acceptable in RIOs.
Linux 4.4.56
futex: Add missing error handling to FUTEX_REQUEUE_PI
futex: Fix potential use-after-free in FUTEX_REQUEUE_PI
x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm
x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y
fscrypto: lock inode while setting encryption policy
fscrypt: fix renaming and linking special files
net sched actions: decrement module reference count after table flush.
dccp: fix memory leak during tear-down of unsuccessful connection request
dccp/tcp: fix routing redirect race
bridge: drop netfilter fake rtable unconditionally
ipv6: avoid write to a possibly cloned skb
ipv6: make ECMP route replacement less greedy
mpls: Send route delete notifications when router module is unloaded
act_connmark: avoid crashing on malformed nlattrs with null parms
uapi: fix linux/packet_diag.h userspace compilation error
vrf: Fix use-after-free in vrf_xmit
dccp: fix use-after-free in dccp_feat_activate_values
net: fix socket refcounting in skb_complete_tx_timestamp()
net: fix socket refcounting in skb_complete_wifi_ack()
tcp: fix various issues for sockets morphing to listen state
dccp: Unlock sock before calling sk_free()
net: net_enable_timestamp() can be called from irq contexts
net: don't call strlen() on the user buffer in packet_bind_spkt()
l2tp: avoid use-after-free caused by l2tp_ip_backlog_recv
ipv4: mask tos for input route
vti6: return GRE_KEY for vti6
vxlan: correctly validate VXLAN ID against VXLAN_N_VID
netlink: remove mmapped netlink support
ANDROID: mmc: core: export emmc revision
BACKPORT: mmc: core: Export device lifetime information through sysfs
ANDROID: android-verity: do not compile as independent module
ANDROID: sched: fix duplicate sched_group_energy const specifiers
config: disable CONFIG_USELIB and CONFIG_FHANDLE
ANDROID: power: align wakeup_sources format
ANDROID: dm: android-verity: allow disable dm-verity for Treble VTS
uid_sys_stats: change to use rt_mutex
ANDROID: vfs: user permission2 in notify_change2
ANDROID: sdcardfs: Fix gid issue
ANDROID: sdcardfs: Use tabs instead of spaces in multiuser.h
ANDROID: sdcardfs: Remove uninformative prints
ANDROID: sdcardfs: move path_put outside of spinlock
ANDROID: sdcardfs: Use case insensitive hash function
ANDROID: sdcardfs: declare MODULE_ALIAS_FS
ANDROID: sdcardfs: Get the blocksize from the lower fs
ANDROID: sdcardfs: Use d_invalidate instead of drop_recurisve
ANDROID: sdcardfs: Switch to internal case insensitive compare
ANDROID: sdcardfs: Use spin_lock_nested
ANDROID: sdcardfs: Replace get/put with d_lock
ANDROID: sdcardfs: rate limit warning print
ANDROID: sdcardfs: Fix case insensitive lookup
ANDROID: uid_sys_stats: account for fsync syscalls
ANDROID: sched: add a counter to track fsync
ANDROID: uid_sys_stats: fix negative write bytes.
ANDROID: uid_sys_stats: allow writing same state
ANDROID: uid_sys_stats: rename uid_cputime.c to uid_sys_stats.c
ANDROID: uid_cputime: add per-uid IO usage accounting
DTB: Add EAS compatible Juno Energy model to 'juno.dts'
arm64: dts: juno: Add idle-states to device tree
ANDROID: Replace spaces by '_' for some android filesystem tracepoints.
usb: gadget: f_accessory: Fix for UsbAccessory clean unbind.
android: binder: move global binder state into context struct.
android: binder: add padding to binder_fd_array_object.
binder: use group leader instead of open thread
nf: IDLETIMER: Use fullsock when querying uid
nf: IDLETIMER: Fix use after free condition during work
ANDROID: dm: android-verity: fix table_make_digest() error handling
ANDROID: usb: gadget: function: Fix commenting style
cpufreq: interactive governor drops bits in time calculation
ANDROID: sdcardfs: support direct-IO (DIO) operations
ANDROID: sdcardfs: implement vm_ops->page_mkwrite
ANDROID: sdcardfs: Don't bother deleting freelist
ANDROID: sdcardfs: Add missing path_put
ANDROID: sdcardfs: Fix incorrect hash
ANDROID: ext4 crypto: Disables zeroing on truncation when there's no key
ANDROID: ext4: add a non-reversible key derivation method
ANDROID: ext4: allow encrypting filenames using HEH algorithm
ANDROID: arm64/crypto: add ARMv8-CE optimized poly_hash algorithm
ANDROID: crypto: heh - factor out poly_hash algorithm
ANDROID: crypto: heh - Add Hash-Encrypt-Hash (HEH) algorithm
ANDROID: crypto: gf128mul - Add ble multiplication functions
ANDROID: crypto: gf128mul - Refactor gf128 overflow macros and tables
UPSTREAM: crypto: gf128mul - Zero memory when freeing multiplication table
ANDROID: crypto: shash - Add crypto_grab_shash() and crypto_spawn_shash_alg()
ANDROID: crypto: allow blkcipher walks over ablkcipher data
UPSTREAM: arm/arm64: crypto: assure that ECB modes don't require an IV
ANDROID: Refactor fs readpage/write tracepoints.
ANDROID: export security_path_chown
Squashfs: optimize reading uncompressed data
Squashfs: implement .readpages()
Squashfs: replace buffer_head with BIO
Squashfs: refactor page_actor
Squashfs: remove the FILE_CACHE option
ANDROID: android-recommended.cfg: CONFIG_CPU_SW_DOMAIN_PAN=y
FROMLIST: 9p: fix a potential acl leak
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
UPSTREAM: udp: properly support MSG_PEEK with truncated buffers
UPSTREAM: arm64: Allow hw watchpoint of length 3,5,6 and 7
BACKPORT: arm64: hw_breakpoint: Handle inexact watchpoint addresses
UPSTREAM: arm64: Allow hw watchpoint at varied offset from base address
BACKPORT: hw_breakpoint: Allow watchpoint of length 3,5,6 and 7
ANDROID: sdcardfs: Switch strcasecmp for internal call
ANDROID: sdcardfs: switch to full_name_hash and qstr
ANDROID: sdcardfs: Add GID Derivation to sdcardfs
ANDROID: sdcardfs: Remove redundant operation
ANDROID: sdcardfs: add support for user permission isolation
ANDROID: sdcardfs: Refactor configfs interface
ANDROID: sdcardfs: Allow non-owners to touch
ANDROID: binder: fix format specifier for type binder_size_t
ANDROID: fs: Export vfs_rmdir2
ANDROID: fs: Export free_fs_struct and set_fs_pwd
BACKPORT: Input: xpad - validate USB endpoint count during probe
BACKPORT: Input: xpad - fix oops when attaching an unknown Xbox One gamepad
ANDROID: mnt: remount should propagate to slaves of slaves
ANDROID: sdcardfs: Switch ->d_inode to d_inode()
ANDROID: sdcardfs: Fix locking issue with permision fix up
ANDROID: sdcardfs: Change magic value
ANDROID: sdcardfs: Use per mount permissions
ANDROID: sdcardfs: Add gid and mask to private mount data
ANDROID: sdcardfs: User new permission2 functions
ANDROID: vfs: Add setattr2 for filesystems with per mount permissions
ANDROID: vfs: Add permission2 for filesystems with per mount permissions
ANDROID: vfs: Allow filesystems to access their private mount data
ANDROID: mnt: Add filesystem private data to mount points
ANDROID: sdcardfs: Move directory unlock before touch
ANDROID: sdcardfs: fix external storage exporting incorrect uid
ANDROID: sdcardfs: Added top to sdcardfs_inode_info
ANDROID: sdcardfs: Switch package list to RCU
ANDROID: sdcardfs: Fix locking for permission fix up
ANDROID: sdcardfs: Check for other cases on path lookup
ANDROID: sdcardfs: override umask on mkdir and create
arm64: kernel: Fix build warning
DEBUG: sched/fair: Fix sched_load_avg_cpu events for task_groups
DEBUG: sched/fair: Fix missing sched_load_avg_cpu events
UPSTREAM: l2tp: fix racy SOCK_ZAPPED flag check in l2tp_ip{,6}_bind()
UPSTREAM: packet: fix race condition in packet_set_ring
UPSTREAM: netlink: Fix dump skb leak/double free
UPSTREAM: net: avoid signed overflows for SO_{SND|RCV}BUFFORCE
MIPS: Prevent "restoration" of MSA context in non-MSA kernels
net: socket: don't set sk_uid to garbage value in ->setattr()
ANDROID: configs: CONFIG_ARM64_SW_TTBR0_PAN=y
UPSTREAM: arm64: Disable PAN on uaccess_enable()
UPSTREAM: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN
UPSTREAM: arm64: xen: Enable user access before a privcmd hvc call
UPSTREAM: arm64: Handle faults caused by inadvertent user access with PAN enabled
BACKPORT: arm64: Disable TTBR0_EL1 during normal kernel execution
BACKPORT: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1
BACKPORT: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro
BACKPORT: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros
UPSTREAM: arm64: alternative: add auto-nop infrastructure
UPSTREAM: arm64: barriers: introduce nops and __nops macros for NOP sequences
Revert "FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros"
Revert "FROMLIST: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro"
Revert "FROMLIST: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1"
Revert "FROMLIST: arm64: Disable TTBR0_EL1 during normal kernel execution"
Revert "FROMLIST: arm64: Handle faults caused by inadvertent user access with PAN enabled"
Revert "FROMLIST: arm64: xen: Enable user access before a privcmd hvc call"
Revert "FROMLIST: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN"
ANDROID: sched/walt: fix build failure if FAIR_GROUP_SCHED=n
ANDROID: trace: net: use %pK for kernel pointers
ANDROID: android-base: Enable QUOTA related configs
net: ipv4: Don't crash if passing a null sk to ip_rt_update_pmtu.
net: inet: Support UID-based routing in IP protocols.
net: core: add UID to flows, rules, and routes
net: core: Add a UID field to struct sock.
Revert "net: core: Support UID-based routing."
UPSTREAM: efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping
UPSTREAM: arm64: mm: always take dirty state from new pte in ptep_set_access_flags
UPSTREAM: arm64: Implement pmdp_set_access_flags() for hardware AF/DBM
UPSTREAM: arm64: Fix typo in the pmdp_huge_get_and_clear() definition
UPSTREAM: arm64: enable CONFIG_DEBUG_RODATA by default
goldfish: enable CONFIG_INET_DIAG_DESTROY
sched/walt: kill {min,max}_capacity
sched: fix wrong truncation of walt_avg
build: fix build config kernel_dir
ANDROID: dm verity: add minimum prefetch size
build: add build server configs for goldfish
usb: gadget: Fix compilation problem with tx_qlen field
Conflicts:
android/configs/android-base.cfg
arch/arm64/Makefile
arch/arm64/include/asm/cpufeature.h
arch/arm64/kernel/vdso/gettimeofday.S
arch/arm64/mm/cache.S
drivers/md/Kconfig
drivers/misc/Makefile
drivers/mmc/host/sdhci.c
drivers/usb/core/hcd.c
drivers/usb/gadget/function/u_ether.c
fs/sdcardfs/derived_perm.c
fs/sdcardfs/file.c
fs/sdcardfs/inode.c
fs/sdcardfs/lookup.c
fs/sdcardfs/main.c
fs/sdcardfs/multiuser.h
fs/sdcardfs/packagelist.c
fs/sdcardfs/sdcardfs.h
fs/sdcardfs/super.c
include/linux/mmc/card.h
include/linux/mmc/mmc.h
include/trace/events/android_fs.h
include/trace/events/android_fs_template.h
drivers/android/binder.c
fs/exec.c
fs/ext4/crypto_key.c
fs/ext4/ext4.h
fs/ext4/inline.c
fs/ext4/inode.c
fs/ext4/readpage.c
fs/f2fs/data.c
fs/f2fs/inline.c
fs/mpage.c
include/linux/dcache.h
include/trace/events/sched.h
include/uapi/linux/ipv6.h
net/ipv4/tcp_ipv4.c
net/netfilter/xt_IDLETIMER.c
Change-Id: Ie345db6a14869fe0aa794aef4b71b5d0d503690b
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
Changes in 4.4.59:
xfrm: policy: init locks early
xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window
xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
virtio_balloon: init 1st buffer in stats vq
pinctrl: qcom: Don't clear status bit on irq_unmask
c6x/ptrace: Remove useless PTRACE_SETREGSET implementation
h8300/ptrace: Fix incorrect register transfer count
mips/ptrace: Preserve previous registers for short regset write
sparc/ptrace: Preserve previous registers for short regset write
metag/ptrace: Preserve previous registers for short regset write
metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS
metag/ptrace: Reject partial NT_METAG_RPIPE writes
fscrypt: remove broken support for detecting keyring key revocation
sched/rt: Add a missing rescheduling point
Linux 4.4.59
Change-Id: Ifa35307b133cbf29d0a0084bb78a7b0436182b53
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The struct irq_domain contains a "struct device_node *" field
(of_node) that is almost the only link between the irqdomain
and the device tree infrastructure.
In order to prepare for the removal of that field, convert all
users to use irq_domain_get_of_node() instead.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Graeme Gregory <graeme@xora.org.uk>
Cc: Jake Oshins <jakeo@microsoft.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Link: http://lkml.kernel.org/r/1444737105-31573-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Pull strscpy string copy function implementation from Chris Metcalf.
Chris sent this during the merge window, but I waffled back and forth on
the pull request, which is why it's going in only now.
The new "strscpy()" function is definitely easier to use and more secure
than either strncpy() or strlcpy(), both of which are horrible nasty
interfaces that have serious and irredeemable problems.
strncpy() has a useless return value, and doesn't NUL-terminate an
overlong result. To make matters worse, it pads a short result with
zeroes, which is a performance disaster if you have big buffers.
strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking
the insane NUL padding, but having a differently broken return value
which returns the original length of the source string. Which means
that it will read characters past the count from the source buffer, and
you have to trust the source to be properly terminated. It also makes
error handling fragile, since the test for overflow is unnecessarily
subtle.
strscpy() avoids both these problems, guaranteeing the NUL termination
(but not excessive padding) if the destination size wasn't zero, and
making the overflow condition very obvious by returning -E2BIG. It also
doesn't read past the size of the source, and can thus be used for
untrusted source data too.
So why did I waffle about this for so long?
Every time we introduce a new-and-improved interface, people start doing
these interminable series of trivial conversion patches.
And every time that happens, somebody does some silly mistake, and the
conversion patch to the improved interface actually makes things worse.
Because the patch is mindnumbing and trivial, nobody has the attention
span to look at it carefully, and it's usually done over large swatches
of source code which means that not every conversion gets tested.
So I'm pulling the strscpy() support because it *is* a better interface.
But I will refuse to pull mindless conversion patches. Use this in
places where it makes sense, but don't do trivial patches to fix things
that aren't actually known to be broken.
* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: use global strscpy() rather than private copy
string: provide strscpy()
Make asm/word-at-a-time.h available on all architectures
Most interrupt flow handlers do not use the irq argument. Those few
which use it can retrieve the irq number from the irq descriptor.
Remove the argument.
Search and replace was done with coccinelle and some extra helper
scripts around it. Thanks to Julia for her help!
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Pull irq updates from Thomas Gleixner:
"This updated pull request does not contain the last few GIC related
patches which were reported to cause a regression. There is a fix
available, but I let it breed for a couple of days first.
The irq departement provides:
- new infrastructure to support non PCI based MSI interrupts
- a couple of new irq chip drivers
- the usual pile of fixlets and updates to irq chip drivers
- preparatory changes for removal of the irq argument from interrupt
flow handlers
- preparatory changes to remove IRQF_VALID"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources
irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2
irqchip: Add documentation for the bcm2836 interrupt controller
irqchip/bcm2835: Add support for being used as a second level controller
irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ
PCI: xilinx: Fix typo in function name
irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance
irqchip/gic: Only allow the primary GIC to set the CPU map
PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove
unicore32/irq: Prepare puv3_gpio_handler for irq argument removal
tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal
m68k/irq: Prepare irq handlers for irq argument removal
C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal
blackfin: Prepare irq handlers for irq argument removal
arc/irq: Prepare idu_cascade_isr for irq argument removal
sparc/irq: Use access helper irq_data_get_affinity_mask()
sparc/irq: Use helper irq_data_get_irq_handler_data()
parisc/irq: Use access helper irq_data_get_affinity_mask()
mn10300/irq: Use access helper irq_data_get_affinity_mask()
irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal
...
Migrate c6x driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.
This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.
We weren't doing anything in ->set_mode(RESUME) and so tick_resume()
isn't implemented.
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: linux-c6x-dev@linux-c6x.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The irq argument of most interrupt flow handlers is unused or merily
used instead of a local variable. The handlers which need the irq
argument can retrieve the irq number from the irq descriptor.
Search and update was done with coccinelle and the invaluable help of
Julia Lawall.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Mark Salter <msalter@redhat.com>
Cc: linux-c6x-dev@linux-c6x.org
Chained irq handlers usually set up handler data as well. We now have
a function to set both under irq_desc->lock. Replace the two calls
with one.
Search and conversion was done with coccinelle.
Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: linux-c6x-dev@linux-c6x.org
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Link: http://lkml.kernel.org/r/20150713130429.697731509@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Commit 2ae416b142 ("mm: new mm hook framework") introduced an empty
header file (mm-arch-hooks.h) for every architecture, even those which
doesn't need to define mm hooks.
As suggested by Geert Uytterhoeven, this could be cleaned through the use
of a generic header file included via each per architecture
asm/include/Kbuild file.
The PowerPC architecture is not impacted here since this architecture has
to defined the arch_remap MM hook.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Added the x86 implementation of word-at-a-time to the
generic version, which previously only supported big-endian.
Omitted the x86-specific load_unaligned_zeropad(), which in
any case is also not present for the existing BE-only
implementation of a word-at-a-time, and is only used under
CONFIG_DCACHE_WORD_ACCESS.
Added as a "generic-y" to the Kbuilds of all architectures
that didn't previously have it.
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Pull asm/scatterlist.h removal from Jens Axboe:
"We don't have any specific arch scatterlist anymore, since parisc
finally switched over. Kill the include"
* 'for-4.2/sg' of git://git.kernel.dk/linux-block:
remove scatterlist.h generation from arch Kbuild files
remove <asm/scatterlist.h>
CRIU is recreating the process memory layout by remapping the checkpointee
memory area on top of the current process (criu). This includes remapping
the vDSO to the place it has at checkpoint time.
However some architectures like powerpc are keeping a reference to the
vDSO base address to build the signal return stack frame by calling the
vDSO sigreturn service. So once the vDSO has been moved, this reference
is no more valid and the signal frame built later are not usable.
This patch serie is introducing a new mm hook framework, and a new
arch_remap hook which is called when mremap is done and the mm lock still
hold. The next patch is adding the vDSO remap and unmap tracking to the
powerpc architecture.
This patch (of 3):
This patch introduces a new set of header file to manage mm hooks:
- per architecture empty header file (arch/x/include/asm/mm-arch-hooks.h)
- a generic header (include/linux/mm-arch-hooks.h)
The architecture which need to overwrite a hook as to redefine it in its
header file, while architecture which doesn't need have nothing to do.
The default hooks are defined in the generic header and are used in the
case the architecture is not defining it.
In a next step, mm hooks defined in include/asm-generic/mm_hooks.h should
be moved here.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull exec domain removal from Richard Weinberger:
"This series removes execution domain support from Linux.
The idea behind exec domains was to support different ABIs. The
feature was never complete nor stable. Let's rip it out and make the
kernel signal handling code less complicated"
* 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits)
arm64: Removed unused variable
sparc: Fix execution domain removal
Remove rest of exec domains.
arch: Remove exec_domain from remaining archs
arc: Remove signal translation and exec_domain
xtensa: Remove signal translation and exec_domain
xtensa: Autogenerate offsets in struct thread_info
x86: Remove signal translation and exec_domain
unicore32: Remove signal translation and exec_domain
um: Remove signal translation and exec_domain
tile: Remove signal translation and exec_domain
sparc: Remove signal translation and exec_domain
sh: Remove signal translation and exec_domain
s390: Remove signal translation and exec_domain
mn10300: Remove signal translation and exec_domain
microblaze: Remove signal translation and exec_domain
m68k: Remove signal translation and exec_domain
m32r: Remove signal translation and exec_domain
m32r: Autogenerate offsets in struct thread_info
frv: Remove signal translation and exec_domain
...
flush_old_exec() has already done that. Back on 2011 a bunch of
instances like that had been kicked out, but that hadn't taken
care of then-out-of-tree architectures, obviously, and they served
as reinfection vector...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
They are needed by other modules, the related error with allmodconfig:
MODPOST 3327 modules
ERROR: "L1P_cache_block_invalidate" [drivers/misc/lkdtm.ko] undefined!
ERROR: "L1D_cache_block_writeback" [drivers/misc/lkdtm.ko] undefined!
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Or can not pass building with allmodconfig:
LD init/built-in.o
drivers/built-in.o: In function `vgacon_switch':
vgacon.c:(.text+0x47f8): undefined reference to `screen_info'
vgacon.c:(.text+0x4810): undefined reference to `screen_info'
drivers/built-in.o: In function `vgacon_resize':
vgacon.c:(.text+0x4ac8): undefined reference to `screen_info'
vgacon.c:(.text+0x4acc): undefined reference to `screen_info'
drivers/built-in.o: In function `vgacon_save_screen':
vgacon.c:(.text+0x4cc8): undefined reference to `screen_info'
drivers/built-in.o:vgacon.c:(.text+0x4cd0): more undefined references to `screen_info' follow
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Or it will cause building break with allmodconfig:
CC [M] drivers/tty/serial/8250/8250_core.o
drivers/tty/serial/8250/8250_core.c:102:24: fatal error: asm/serial.h: No such file or directory
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
c6x does not implement get_dma_ops() for dma-mapping-common.h. And in
dma-mapping-common.h, dma_sync_single_range_for_device() may be dummy.
So c6x can just define a dummy function for allmodconfig building.
CC [M] drivers/net/ethernet/micrel/ks8851.o
drivers/net/ethernet/micrel/ks8842.c: In function 'ks8842_tx_frame_dma':
drivers/net/ethernet/micrel/ks8842.c:453:2: error: implicit declaration of function 'dma_sync_single_range_for_device' [-Werror=implicit-function-declaration]
dma_sync_single_range_for_device(adapter->dev,
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Some modules may assume "asm/setup.h" already include all headers which
needed by itself. So need let "asm/setup.h" include "linux/types.h", the
related error:
C [M] drivers/input/joydev.o
In file included from include/asm-generic/page.h:23:0,
from ./arch/c6x/include/asm/page.h:9,
from include/asm-generic/io.h:14,
from arch/c6x/include/generated/asm/io.h:1,
from drivers/input/joydev.c:15:
./arch/c6x/include/asm/setup.h:17:27: error: unknown type name 'phys_addr_t'
extern int c6x_add_memory(phys_addr_t start, unsigned long size);
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
For supporting uClinux flat-format executables, c6x needs to define the
fewest features to support it, at present, xtensa architecture has the
fewest feature for it, so just copy xtensa flat.h. The related error:
CC fs/binfmt_flat.o
In file included from fs/binfmt_flat.c:36:0:
include/linux/flat.h:12:22: fatal error: asm/flat.h: No such file or directory
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
early_init_dt_scan() accepts "void *", the related warning:
CC arch/c6x/kernel/setup.o
arch/c6x/kernel/setup.c: In function 'machine_init':
arch/c6x/kernel/setup.c:290:21: warning: passing argument 1 of 'early_init_dt_scan' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
early_init_dt_scan(fdt);
^
In file included from arch/c6x/kernel/setup.c:19:0:
include/linux/of_fdt.h:75:13: note: expected 'void *' but argument is of type 'const void *'
extern bool early_init_dt_scan(void *params);
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
For gcc5 c6x raw compiler, at present, it may not define __linux__, so
c6x kernel still needs to define __linux__ just like another archs have
done. The related error:
CC [M] fs/coda/psdev.o
In file included from include/linux/coda.h:64:0,
from fs/coda/psdev.c:45:
include/uapi/linux/coda.h:221:2: error: unknown type name 'u_quad_t'
u_quad_t va_size; /* file size in bytes */
^
include/uapi/linux/coda.h:229:2: error: unknown type name 'u_quad_t'
u_quad_t va_bytes; /* bytes of disk space held by file */
^
include/uapi/linux/coda.h:230:2: error: unknown type name 'u_quad_t'
u_quad_t va_filerev; /* file modification number */
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
time_init invokes timer64_init (which is __init annotation)
since all of these are invoked at init time, lets maintain
consistency by ensuring time_init is marked appropriately
as well.
This fixes the following warning with CONFIG_DEBUG_SECTION_MISMATCH=y
WARNING: vmlinux.o(.text+0x3bfc): Section mismatch in reference from the function time_init() to the function .init.text:timer64_init()
The function time_init() references
the function __init timer64_init().
This is often because time_init lacks a __init
annotation or the annotation of timer64_init is wrong.
Fixes: 546a39546c ("C6X: time management")
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
When !MMU, asm-generic will not define default pgprot_writecombine, so c6x
needs to define it by itself. The related error:
CC [M] fs/pstore/ram_core.o
fs/pstore/ram_core.c: In function 'persistent_ram_vmap':
fs/pstore/ram_core.c:399:10: error: implicit declaration of function 'pgprot_writecombine' [-Werror=implicit-function-declaration]
prot = pgprot_writecombine(PAGE_KERNEL);
^
fs/pstore/ram_core.c:399:8: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
prot = pgprot_writecombine(PAGE_KERNEL);
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Or c6x will cause building break for allmodconfig, the related error:
CC arch/c6x/kernel/setup.o
arch/c6x/kernel/setup.c: In function 'setup_arch':
arch/c6x/kernel/setup.c:433:2: error: 'conswitchp' undeclared (first use in this function)
conswitchp = &dummy_con;
^
arch/c6x/kernel/setup.c:433:2: note: each undeclared identifier is reported only once for each function it appears in
arch/c6x/kernel/setup.c:433:16: error: 'dummy_con' undeclared (first use in this function)
conswitchp = &dummy_con;
^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
[removed unnecessary #ifdef around include]
Signed-off-by: Mark Salter <msalter@redhat.com>
If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is because the
restart_block is held in the same memory allocation as the kernel stack.
Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.
Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.
It's also a decent simplification, since the restart code is more or less
identical on all architectures.
[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
As there are now no remaining users of arch_fast_hash(), lets kill
it entirely.
This basically reverts commit 71ae8aac3e ("lib: introduce arch
optimized hash library") and follow-up work, that is f.e., commit
237217546d ("lib: hash: follow-up fixups for arch hash"),
commit e3fec2f74f ("lib: Add missing arch generic-y entries for
asm-generic/hash.h") and last but not least commit 6a02652df5
("perf tools: Fix include for non x86 architectures").
Cc: Francesco Fusco <fusco@ntop.org>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The nohz full code needs irq work to trigger its own interrupt so that
the subsystem can work even when the tick is stopped.
Lets introduce arch_irq_work_has_interrupt() that archs can override to
tell about their support for this ability.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Pull arch signal handling cleanup from Richard Weinberger:
"This patch series moves all remaining archs to the get_signal(),
signal_setup_done() and sigsp() functions.
Currently these archs use open coded variants of the said functions.
Further, unused parameters get removed from get_signal_to_deliver(),
tracehook_signal_handler() and signal_delivered().
At the end of the day we save around 500 lines of code."
* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
powerpc: Use sigsp()
openrisc: Use sigsp()
mn10300: Use sigsp()
mips: Use sigsp()
microblaze: Use sigsp()
metag: Use sigsp()
m68k: Use sigsp()
m32r: Use sigsp()
hexagon: Use sigsp()
frv: Use sigsp()
cris: Use sigsp()
c6x: Use sigsp()
blackfin: Use sigsp()
avr32: Use sigsp()
arm64: Use sigsp()
arc: Use sigsp()
sas_ss_flags: Remove nested ternary if
Rip out get_signal_to_deliver()
Clean up signal_delivered()
tracehook_signal_handler: Remove sig, info, ka and regs
...
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.
Tested-by: Mark Salter <msalter@redhat.com>
Acked-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
The arch_mutex_cpu_relax() function, introduced by 34b133f, is
hacky and ugly. It was added a few years ago to address the fact
that common cpu_relax() calls include yielding on s390, and thus
impact the optimistic spinning functionality of mutexes. Nowadays
we use this function well beyond mutexes: rwsem, qrwlock, mcs and
lockref. Since the macro that defines the call is in the mutex header,
any users must include mutex.h and the naming is misleading as well.
This patch (i) renames the call to cpu_relax_lowlatency ("relax, but
only if you can do it with very low latency") and (ii) defines it in
each arch's asm/processor.h local header, just like for regular cpu_relax
functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax,
and thus we can take it out of mutex.h. While this can seem redundant,
I believe it is a good choice as it allows us to move out arch specific
logic from generic locking primitives and enables future(?) archs to
transparently define it, similarly to System Z.
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Bharat Bhushan <r65777@freescale.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Joe Perches <joe@perches.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Joseph Myers <joseph@codesourcery.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Nicolas Pitre <nico@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Stratos Karafotis <stratosk@semaphore.gr>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vasily Kulikov <segoon@openwall.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux390@de.ibm.com
Cc: linux-alpha@vger.kernel.org
Cc: linux-am33-list@redhat.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-cris-kernel@axis.com
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux@lists.openrisc.net
Cc: linux-m32r-ja@ml.linux-m32r.org
Cc: linux-m32r@ml.linux-m32r.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-metag@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most architectures
except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The introduction
of generic serial earlycon support went in thru tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates
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Merge tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into next
Pull DeviceTree updates from Rob Herring:
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most
architectures except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The
introduction of generic serial earlycon support went in through the
tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates
* tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits)
of: handle NULL node in next_child iterators
of/irq: provide more wrappers for !CONFIG_OF
devicetree: bindings: Document micrel vendor prefix
dt: bindings: dwc2: fix required value for the phy-names property
of_pci_irq: kill useless variable in of_irq_parse_pci()
of/irq: do irq resolution in platform_get_irq_byname()
of: Add a testcase for of_find_node_by_path()
of: Make of_find_node_by_path() handle /aliases
of: Create unlocked version of for_each_child_of_node()
lib: add glibc style strchrnul() variant
of: Handle memory@0 node on PPC32 only
pci/of: Remove dead code
of: fix race between search and remove in of_update_property()
of: Use NULL for pointers
of: Stop naming platform_device using dcr address
of: Ensure unique names without sacrificing determinism
tty/serial: pl011: add DT based earlycon support
of/fdt: add FDT serial scanning for earlycon
of/fdt: add FDT address translation support
serial: earlycon: add DT support
...
The architecture code does not need to access the internals of the FDT
blob, so make the pointer to it void *.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: linux-c6x-dev@linux-c6x.org
Tested-by: Grant Likely <grant.likely@linaro.org>
c6x doesn't have a barrier.h and completely relies on
asm-generic/barrier.h. Therefore its smp_mb() is barrier() and we can
use the default versions that are smp_mb().
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Mark Salter <msalter@redhat.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-kl53k3pyj0rbd80jq8ralpf3@git.kernel.org
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull core locking updates from Ingo Molnar:
"The biggest change is the MCS spinlock generalization changes from Tim
Chen, Peter Zijlstra, Jason Low et al. There's also lockdep
fixes/enhancements from Oleg Nesterov, in particular a false negative
fix related to lockdep_set_novalidate_class() usage"
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
locking/mutex: Fix debug checks
locking/mutexes: Add extra reschedule point
locking/mutexes: Introduce cancelable MCS lock for adaptive spinning
locking/mutexes: Unlock the mutex without the wait_lock
locking/mutexes: Modify the way optimistic spinners are queued
locking/mutexes: Return false if task need_resched() in mutex_can_spin_on_owner()
locking: Move mcs_spinlock.h into kernel/locking/
m68k: Skip futex_atomic_cmpxchg_inatomic() test
futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test
Revert "sched/wait: Suppress Sparse 'variable shadowing' warning"
lockdep: Change lockdep_set_novalidate_class() to use _and_name
lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no_validate
lockdep: Don't create the wrong dependency on hlock->check == 0
lockdep: Make held_lock->check and "int check" argument bool
locking/mcs: Allow architecture specific asm files to be used for contended case
locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order
sched/wait: Suppress Sparse 'variable shadowing' warning
hung_task/Documentation: Fix hung_task_warnings description
locking/mcs: Allow architectures to hook in to contended paths
locking/mcs: Micro-optimize the MCS code, add extra comments
...
A patch to linux/irqflags.h uncovered a problem with c6x asm/cache.h
which causes a build failure:
/arch/c6x/include/asm/cache.h:63:20: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘c6x_cache_init’
extern void __init c6x_cache_init(void);
The asm/cache.h was relying on linux/irqflags.h to pull in linux/init.h
but the recent patch changed that. The c6x header should have included
linux/init.h all along.
Signed-off-by: Mark Salter <msalter@redhat.com>
This patch allows each architecture to add its specific assembly optimized
arch_mcs_spin_lock_contended and arch_mcs_spinlock_uncontended for
MCS lock and unlock functions.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Scott J Norton <scott.norton@hp.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: AswinChandramouleeswaran <aswin@hp.com>
Cc: George Spelvin <linux@horizon.com>
Cc: Rik vanRiel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: MichelLespinasse <walken@google.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Alex Shi <alex.shi@linaro.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Figo.zhang" <figo1802@gmail.com>
Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew R Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1390347382.3138.67.camel@schen9-DESK
Signed-off-by: Ingo Molnar <mingo@kernel.org>
We perform a clean up of the Kbuid files in each architecture.
We order the files in each Kbuild in alphabetical order
by running the below script.
for i in arch/*/include/asm/Kbuild
do
cat $i | gawk '/^generic-y/ {
i = 3;
do {
for (; i <= NF; i++) {
if ($i == "\\") {
getline;
i = 1;
continue;
}
if ($i != "")
hdr[$i] = $i;
}
break;
} while (1);
next;
}
// {
print $0;
}
END {
n = asort(hdr);
for (i = 1; i <= n; i++)
print "generic-y += " hdr[i];
}' > ${i}.sorted;
mv ${i}.sorted $i;
done
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew R Wilcox <matthew.r.wilcox@intel.com>
Cc: AswinChandramouleeswaran <aswin@hp.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Scott J Norton <scott.norton@hp.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: "Figo.zhang" <figo1802@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Alex Shi <alex.shi@linaro.org>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: George Spelvin <linux@horizon.com>
Cc: MichelLespinasse <walken@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
[ Fixed build bug. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull irq cleanups from Ingo Molnar:
"This is a multi-arch cleanup series from Thomas Gleixner, which we
kept to near the end of the merge window, to not interfere with
architecture updates.
This series (motivated by the -rt kernel) unifies more aspects of IRQ
handling and generalizes PREEMPT_ACTIVE"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
preempt: Make PREEMPT_ACTIVE generic
sparc: Use preempt_schedule_irq
ia64: Use preempt_schedule_irq
m32r: Use preempt_schedule_irq
hardirq: Make hardirq bits generic
m68k: Simplify low level interrupt handling code
genirq: Prevent spurious detection for unconditionally polled interrupts
