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authorAndrew Morton <akpm@linux-foundation.org>2007-06-08 13:47:01 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-08 17:23:34 -0700
commitb39b70366c5be68affe9777de72846540d840464 (patch)
treefaae0447c5661e87061c5a046db4bb9cf181d0c9 /arch/x86_64
parent12710a56cb56e81bd8f457cc2f50c2ebfc0cb390 (diff)
downloadlinux-2.6.34-ux500-b39b70366c5be68affe9777de72846540d840464.tar.gz
x86_64: oops_begin() fix
We don't want to see this: > BUG: using smp_processor_id() in preemptible [00000001] code: bash/3857 > caller is oops_begin+0xb/0x6f > > Call Trace: > [<ffffffff8020ab4d>] show_trace+0x34/0x4f > [<ffffffff8020ab7a>] dump_stack+0x12/0x17 > [<ffffffff8030d92d>] debug_smp_processor_id+0xad/0xbc > [<ffffffff8042388f>] oops_begin+0xb/0x6f > [<ffffffff8042520b>] do_page_fault+0x66a/0x7c0 > [<ffffffff804234bd>] error_exit+0x0/0x84 > coming out when the kernel is trying to oops. Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/traps.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index cb29fb96948..aac1c0be54c 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -465,13 +465,14 @@ static unsigned int die_nest_count;
unsigned __kprobes long oops_begin(void)
{
- int cpu = smp_processor_id();
+ int cpu;
unsigned long flags;
oops_enter();
/* racy, but better than risking deadlock. */
local_irq_save(flags);
+ cpu = smp_processor_id();
if (!spin_trylock(&die_lock)) {
if (cpu == die_owner)
/* nested oops. should stop eventually */;