diff options
Diffstat (limited to 'kernel/kprobes.c')
| -rw-r--r-- | kernel/kprobes.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 3050631e528d..1c18ecf9f98b 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2213,13 +2213,9 @@ int register_kretprobe(struct kretprobe *rp) rp->kp.post_handler = NULL; /* Pre-allocate memory for max kretprobe instances */ - if (rp->maxactive <= 0) { -#ifdef CONFIG_PREEMPTION + if (rp->maxactive <= 0) rp->maxactive = max_t(unsigned int, 10, 2*num_possible_cpus()); -#else - rp->maxactive = num_possible_cpus(); -#endif - } + #ifdef CONFIG_KRETPROBE_ON_RETHOOK rp->rh = rethook_alloc((void *)rp, kretprobe_rethook_handler); if (!rp->rh) @@ -2364,6 +2360,14 @@ static void kill_kprobe(struct kprobe *p) lockdep_assert_held(&kprobe_mutex); + /* + * The module is going away. We should disarm the kprobe which + * is using ftrace, because ftrace framework is still available at + * 'MODULE_STATE_GOING' notification. + */ + if (kprobe_ftrace(p) && !kprobe_disabled(p) && !kprobes_all_disarmed) + disarm_kprobe_ftrace(p); + p->flags |= KPROBE_FLAG_GONE; if (kprobe_aggrprobe(p)) { /* @@ -2380,14 +2384,6 @@ static void kill_kprobe(struct kprobe *p) * the original probed function (which will be freed soon) any more. */ arch_remove_kprobe(p); - - /* - * The module is going away. We should disarm the kprobe which - * is using ftrace, because ftrace framework is still available at - * 'MODULE_STATE_GOING' notification. - */ - if (kprobe_ftrace(p) && !kprobe_disabled(p) && !kprobes_all_disarmed) - disarm_kprobe_ftrace(p); } /* Disable one kprobe */ |