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>
projects / profile / ivi / kernel-adaptation-intel-automotive.git / commit