powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning !
This patch tries to fix the following BUG report:
[ 0.012313] BUG: MAX_STACK_TRACE_ENTRIES too low!
[ 0.012318] turning off the locking correctness validator.
[ 0.012321] Call Trace:
[ 0.012330] [
c00000017666f6d0] [
c000000000012128] .show_stack+0x78/0x184 (unreliable)
[ 0.012339] [
c00000017666f780] [
c0000000000b6348] .save_trace+0x12c/0x14c
[ 0.012345] [
c00000017666f800] [
c0000000000b7448] .mark_lock+0x2bc/0x710
[ 0.012351] [
c00000017666f8b0] [
c0000000000bb198] .__lock_acquire+0x748/0xaec
[ 0.012357] [
c00000017666f9b0] [
c0000000000bb684] .lock_acquire+0x148/0x194
[ 0.012365] [
c00000017666fa80] [
c00000000069371c] .mutex_lock_nested+0x84/0x4ec
[ 0.012372] [
c00000017666fb90] [
c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c
[ 0.012380] [
c00000017666fc30] [
c0000000009ba910] .spawn_ksoftirqd+0x28/0x48
[ 0.012386] [
c00000017666fcb0] [
c00000000000a98c] .do_one_initcall+0xd8/0x1d0
[ 0.012392] [
c00000017666fd60] [
c00000000000b1f8] .kernel_init+0x120/0x398
[ 0.012398] [
c00000017666fe30] [
c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64
[ 0.012404] [
c00000017666fa00] [
c00000017666fb20] 0xc00000017666fb20
[ 0.012410] [
c00000017666fa80] [
c00000000069371c] .mutex_lock_nested+0x84/0x4ec
[ 0.012416] [
c00000017666fb90] [
c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c
[ 0.012422] [
c00000017666fc30] [
c0000000009ba910] .spawn_ksoftirqd+0x28/0x48
[ 0.012427] [
c00000017666fcb0] [
c00000000000a98c] .do_one_initcall+0xd8/0x1d0
[ 0.012433] [
c00000017666fd60] [
c00000000000b1f8] .kernel_init+0x120/0x398
[ 0.012439] [
c00000017666fe30] [
c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64
.......
The reason is that the back chain of
c00000017666fe30
(ret_from_kernel_thread) contains some invalid value, which might form a
loop.
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
projects / openwrt / staging / blogic.git / commit