x86: fix kprobe_handler reenable preemption

Fix a preemption bug in kprobe_handler(). It has to call preempt_enable()
before returning.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 521a469acaad..f0f2b98b9e20 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -467,7 +467,8 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
                                 arch_disarm_kprobe(p);
                                 regs->ip = (unsigned long)p->addr;
                                 reset_current_kprobe();
-                                return 1;
+                                ret = 1;
+                                goto no_kprobe;
 #endif
                         }
                         /* We have reentered the kprobe_handler(), since