diff options
Diffstat (limited to 'arch/powerpc/kernel/kprobes-ftrace.c')
| -rw-r--r-- | arch/powerpc/kernel/kprobes-ftrace.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/powerpc/kernel/kprobes-ftrace.c b/arch/powerpc/kernel/kprobes-ftrace.c index 070d1d862444..e4a49c051325 100644 --- a/arch/powerpc/kernel/kprobes-ftrace.c +++ b/arch/powerpc/kernel/kprobes-ftrace.c @@ -32,11 +32,9 @@ void kprobe_ftrace_handler(unsigned long nip, unsigned long parent_nip, struct kprobe *p; struct kprobe_ctlblk *kcb; - preempt_disable(); - p = get_kprobe((kprobe_opcode_t *)nip); if (unlikely(!p) || kprobe_disabled(p)) - goto end; + return; kcb = get_kprobe_ctlblk(); if (kprobe_running()) { @@ -60,18 +58,13 @@ void kprobe_ftrace_handler(unsigned long nip, unsigned long parent_nip, kcb->kprobe_status = KPROBE_HIT_SSDONE; p->post_handler(p, regs, 0); } - __this_cpu_write(current_kprobe, NULL); - } else { - /* - * If pre_handler returns !0, it sets regs->nip and - * resets current kprobe. In this case, we should not - * re-enable preemption. - */ - return; } + /* + * If pre_handler returns !0, it changes regs->nip. We have to + * skip emulating post_handler. + */ + __this_cpu_write(current_kprobe, NULL); } -end: - preempt_enable_no_resched(); } NOKPROBE_SYMBOL(kprobe_ftrace_handler); |