diff options
| -rw-r--r-- | kernel/cpu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 171cb6ce29c7..80c72da6af95 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -76,9 +76,11 @@ static DEFINE_PER_CPU(struct hotplug_pcp, hotplug_pcp); */ void pin_current_cpu(void) { - struct hotplug_pcp *hp = &__get_cpu_var(hotplug_pcp); + struct hotplug_pcp *hp; retry: + hp = &__get_cpu_var(hotplug_pcp); + if (!hp->unplug || hp->refcount || preempt_count() > 1 || hp->unplug == current || (current->flags & PF_STOMPER)) { hp->refcount++; |