Yang Shi cf0a25436f arm64: replace read_lock to rcu lock in call_step_hook ... 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>		2016-02-16 15:40:45 +00:00
..
alpha	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
arc	ARC fixes for 4.5	2016-02-13 08:18:21 -08:00
arm	Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm	2016-02-14 10:46:47 -08:00
arm64	arm64: replace read_lock to rcu lock in call_step_hook	2016-02-16 15:40:45 +00:00
avr32	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
blackfin	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
c6x	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
cris	Merge branch 'akpm' (patches from Andrew)	2016-01-21 12:32:08 -08:00
frv	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
h8300	Merge branch 'akpm' (patches from Andrew)	2016-01-21 12:32:08 -08:00
hexagon	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
ia64	[IA64] Enable copy_file_range syscall for ia64	2016-01-22 14:20:01 -08:00
m32r	m32r: fix build failure due to SMP and MMU	2016-02-05 18:10:40 -08:00
m68k	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
metag	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
microblaze	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
mips	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2016-02-14 10:49:01 -08:00
mn10300	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
nios2	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
openrisc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
parisc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
powerpc	powerpc fixes for 4.5	2016-01-29 16:10:16 -08:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2016-01-29 16:05:18 -08:00
score	Merge branch 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2015-10-04 16:31:13 +01:00
sh	sh: fix smp_store_mb for !SMP	2016-01-26 10:18:29 +02:00
sparc	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
tile	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
um	um: asm/page.h: remove the pte_high member from struct pte_t	2016-02-05 18:10:40 -08:00
unicore32	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
x86	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-02-14 10:50:26 -08:00
xtensa	dma-mapping: remove <asm-generic/dma-coherent.h>	2016-01-20 17:09:18 -08:00
.gitignore	…
Kconfig	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00