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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-18 03:13:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-18 03:13:46 -0700
commit7f12b72bd8532cbbfb147470f0d902260cea36ce (patch)
treec62e7f0597faebd0e04acd34b3e6038629d849af /arch
parent8864f5ee12d03afe269edeeae440744f53ea4af1 (diff)
parent52004ea7ca4c52a219362f973bfd1eb86ff668ce (diff)
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf evlist: Fix per thread mmap setup perf tools: Honour the cpu list parameter when also monitoring a thread list kprobes, x86: Disable irqs during optimized callback
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/kprobes.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index c969fd9d156..f1a6244d7d9 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -1183,12 +1183,13 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op,
struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ unsigned long flags;
/* This is possible if op is under delayed unoptimizing */
if (kprobe_disabled(&op->kp))
return;
- preempt_disable();
+ local_irq_save(flags);
if (kprobe_running()) {
kprobes_inc_nmissed_count(&op->kp);
} else {
@@ -1207,7 +1208,7 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op,
opt_pre_handler(&op->kp, regs);
__this_cpu_write(current_kprobe, NULL);
}
- preempt_enable_no_resched();
+ local_irq_restore(flags);
}
static int __kprobes copy_optimized_instructions(u8 *dest, u8 *src)