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| author | Kumar Gala <galak@kernel.crashing.org> | 2009-06-19 04:30:42 -0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-06-23 09:09:57 -0400 |
| commit | cb1ffb6204712b04396ae0a9f3d1bf93cd8df8fb (patch) | |
| tree | 3420697b7f454f89525f8d3d1ce724daa3eb8b43 /Documentation/basic_profiling.txt | |
| parent | fa874618c3155e4f255387987d630a203578b5ae (diff) | |
powerpc/85xx: Fix issue found by lockdep trace in smp_85xx_kick_cpu
lockdep trace found the following:
------------[ cut here ]------------
Badness at c007baf0 [verbose debug info unavailable]
NIP: c007baf0 LR: c007bad8 CTR: 00000000
REGS: ef855e00 TRAP: 0700 Tainted: G W
(2.6.30-06736-g12a31df-dirty)
MSR: 00021000 <ME,CE> CR: 24044022 XER: 20000000
TASK = ef858000[1] 'swapper' THREAD: ef854000 CPU: 0
GPR00: 00000000 ef855eb0 ef858000 00000001 000000d0 f1000000 ffbc8000 ffffffff
GPR08: 000000d0 c0760000 c0710000 00000007 2fffffff 1004a388 7ffd9400 00000000
GPR16: 00000000 7ffcd100 7ffcd100 7ffcd100 c059cd78 c075c498 c057da7c ffffffff
GPR24: ffbc8000 f1000000 00000001 c00bf8b0 c07595d4 000000d0 00021000 000000d0
NIP [c007baf0] lockdep_trace_alloc+0xc0/0xf0
LR [c007bad8] lockdep_trace_alloc+0xa8/0xf0
Call Trace:
[ef855eb0] [c007ba60] lockdep_trace_alloc+0x30/0xf0 (unreliable)
[ef855ec0] [c00cb3ac] kmem_cache_alloc+0x2c/0xf0
[ef855ee0] [c00bf8b0] __get_vm_area_node+0x80/0x1c0
[ef855f10] [c0017580] __ioremap_caller+0x1d0/0x1e0
[ef855f40] [c057da7c] smp_85xx_kick_cpu+0x64/0x124
[ef855f60] [c0599180] __cpu_up+0xd0/0x1a4
[ef855f80] [c05997c4] cpu_up+0x14c/0x1e0
[ef855fc0] [c05732a0] kernel_init+0x100/0x1c4
[ef855ff0] [c0011524] kernel_thread+0x4c/0x68
Instruction dump:
8009c174 2f800000 409e0048 73c08000 40820040 4818980d 2f830000 419effa0
3d20c076 8009c388 2f800000 409eff90 <0fe00000> 4bffff88 60000000 60000000
We were calling ioremap after we local_irq_restore(flags). A simple
reorder fixes the problem.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation/basic_profiling.txt')
0 files changed, 0 insertions, 0 deletions