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authorChristoph Hellwig <hch@infradead.org>2007-04-30 11:56:46 +0100
committerPaul Mackerras <paulus@samba.org>2007-05-02 20:57:39 +1000
commit9f90b997de4efd5404a8c52f89c400f0f4e2d216 (patch)
tree7dd6adc27b196e672fedd464a42700e336cd210a /arch/powerpc/kernel/kprobes.c
parenteb609e52d188775da738a1ffd1e982e6212c77d7 (diff)
[POWERPC] Minor fault path optimization
Call the kprobes pagefault handler directly instead of going through the complex notifier chain. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/kprobes.c')
-rw-r--r--arch/powerpc/kernel/kprobes.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index ef647e7a9dc..c27f41870c8 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -410,7 +410,7 @@ out:
return 1;
}
-static int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
{
struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
@@ -495,14 +495,6 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
if (post_kprobe_handler(args->regs))
ret = NOTIFY_STOP;
break;
- case DIE_PAGE_FAULT:
- /* kprobe_running() needs smp_processor_id() */
- preempt_disable();
- if (kprobe_running() &&
- kprobe_fault_handler(args->regs, args->trapnr))
- ret = NOTIFY_STOP;
- preempt_enable();
- break;
default:
break;
}