diff options
Diffstat (limited to 'arch/ia64/kernel/kprobes.c')
| -rw-r--r-- | arch/ia64/kernel/kprobes.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index 471086b808a..1e80ec80dd2 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -395,7 +395,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) /* * By returning a non-zero value, we are telling * kprobe_handler() that we have handled unlocking - * and re-enabling preemption. + * and re-enabling preemption */ return 1; } @@ -607,8 +607,6 @@ static int __kprobes pre_kprobes_handler(struct die_args *args) struct pt_regs *regs = args->regs; kprobe_opcode_t *addr = (kprobe_opcode_t *)instruction_pointer(regs); - preempt_disable(); - /* Handle recursion cases */ if (kprobe_running()) { p = get_kprobe(addr); @@ -665,6 +663,11 @@ static int __kprobes pre_kprobes_handler(struct die_args *args) goto no_kprobe; } + /* + * This preempt_disable() matches the preempt_enable_no_resched() + * in post_kprobes_handler() + */ + preempt_disable(); kprobe_status = KPROBE_HIT_ACTIVE; set_current_kprobe(p); @@ -682,7 +685,6 @@ ss_probe: return 1; no_kprobe: - preempt_enable_no_resched(); return ret; } @@ -733,22 +735,26 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data) { struct die_args *args = (struct die_args *)data; + int ret = NOTIFY_DONE; + + preempt_disable(); switch(val) { case DIE_BREAK: if (pre_kprobes_handler(args)) - return NOTIFY_STOP; + ret = NOTIFY_STOP; break; case DIE_SS: if (post_kprobes_handler(args->regs)) - return NOTIFY_STOP; + ret = NOTIFY_STOP; break; case DIE_PAGE_FAULT: if (kprobes_fault_handler(args->regs, args->trapnr)) - return NOTIFY_STOP; + ret = NOTIFY_STOP; default: break; } - return NOTIFY_DONE; + preempt_enable(); + return ret; } int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) |