Yang Shi f6dffe7718 arm64: replace read_lock to rcu lock in call_step_hook ... commit cf0a25436f05753aca5151891aea4fd130556e2a upstream. BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917 in_atomic(): 1, irqs_disabled(): 128, pid: 383, name: sh Preemption disabled at:[<ffff800000124c18>] kgdb_cpu_enter+0x158/0x6b8 CPU: 3 PID: 383 Comm: sh Tainted: G W 4.1.13-rt13 #2 Hardware name: Freescale Layerscape 2085a RDB Board (DT) Call trace: [<ffff8000000885e8>] dump_backtrace+0x0/0x128 [<ffff800000088734>] show_stack+0x24/0x30 [<ffff80000079a7c4>] dump_stack+0x80/0xa0 [<ffff8000000bd324>] ___might_sleep+0x18c/0x1a0 [<ffff8000007a20ac>] __rt_spin_lock+0x2c/0x40 [<ffff8000007a2268>] rt_read_lock+0x40/0x58 [<ffff800000085328>] single_step_handler+0x38/0xd8 [<ffff800000082368>] do_debug_exception+0x58/0xb8 Exception stack(0xffff80834a1e7c80 to 0xffff80834a1e7da0) 7c80: ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7e40 ffff8083 001bfcc4 ffff8000 7ca0: f2000400 00000000 00000000 00000000 4a1e7d80 ffff8083 0049501c ffff8000 7cc0: 00005402 00000000 00aaa210 ffff8000 4a1e7ea0 ffff8083 000833f4 ffff8000 7ce0: ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7ea0 ffff8083 001bfcc0 ffff8000 7d00: 4a0fc400 ffff8083 00005402 00000000 4a1e7d40 ffff8083 00490324 ffff8000 7d20: ffffff9c 00000000 92c23ba0 0000ffff 000a0000 00000000 00000000 00000000 7d40: 00000008 00000000 00080000 00000000 92c23b8b 0000ffff 92c23b8e 0000ffff 7d60: 00000038 00000000 00001cb2 00000000 00000005 00000000 92d7b498 0000ffff 7d80: 01010101 01010101 92be9000 0000ffff 00000000 00000000 00000030 00000000 [<ffff8000000833f4>] el1_dbg+0x18/0x6c This issue is similar with 62c6c61("arm64: replace read_lock to rcu lock in call_break_hook"), but comes to single_step_handler. This also solves kgdbts boot test silent hang issue on 4.4 -rt kernel. Signed-off-by: Yang Shi <yang.shi@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-04-20 15:42:14 +09:00
..
alpha	mm: mlock: add mlock flags to enable VM_LOCKONFAULT usage	2015-11-05 19:34:48 -08:00
arc	ARC: bitops: Remove non relevant comments	2016-04-12 09:08:56 -07:00
arm	ARM: dts: at91: sama5d4 Xplained: don't disable hsmci regulator	2016-04-12 09:09:03 -07:00
arm64	arm64: replace read_lock to rcu lock in call_step_hook	2016-04-20 15:42:14 +09:00
avr32	dmaengine updates for 4.4-rc1	2015-11-10 10:05:17 -08:00
blackfin	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
c6x
cris	cris: Drop reference to get_cmos_time()	2015-11-02 20:03:05 +01:00
frv	kmap_atomic_to_page() has no users, remove it	2015-11-09 15:11:24 -08:00
h8300	h8300 update for v4.4	2015-11-12 15:26:39 -08:00
hexagon
ia64	ia64: define ioremap_uc()	2016-04-12 09:08:54 -07:00
m32r	m32r: fix m32104ut_defconfig build fail	2016-02-25 12:01:22 -08:00
m68k	m68k: Wire up mlock2	2015-11-22 11:35:26 +01:00
metag	Metag architecture changes for v4.4	2015-11-10 16:24:25 -08:00
microblaze	Revert "scatterlist: use sg_phys()"	2015-12-15 12:54:06 -08:00
mips	pcmcia: db1xxx_ss: fix last irq_to_gpio user	2016-04-20 15:42:09 +09:00
mn10300	mn10300: Select CONFIG_HAVE_UID16 to fix build failure	2015-11-30 07:01:40 -08:00
nios2	nios2: fix cache coherency	2015-11-26 22:25:58 +08:00
openrisc
parisc	parisc: Unbreak handling exceptions from kernel modules	2016-04-20 15:41:52 +09:00
powerpc	powerpc/mm: Fixup preempt underflow with huge pages	2016-04-20 15:41:53 +09:00
s390	s390/pci: enforce fmb page boundary rule	2016-04-12 09:08:37 -07:00
score
sh	sched/preempt, sh: kmap_coherent relies on disabled preemption	2016-04-12 09:08:36 -07:00
sparc	sparc64: fix incorrect sign extension in sys_sparc64_personality	2016-03-03 15:07:17 -08:00
tile	tile: provide CONFIG_PAGE_SIZE_64KB etc for tilepro	2016-01-05 08:16:09 -05:00
um	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-04-12 09:08:58 -07:00
unicore32	pwm: Changes for v4.4-rc1	2015-11-11 09:16:10 -08:00
x86	KVM: x86: reduce default value of halt_poll_ns parameter	2016-04-20 15:42:07 +09:00
xtensa	xtensa: clear all DBREAKC registers on start	2016-04-12 09:08:55 -07:00
.gitignore
Kconfig