diff options
Diffstat (limited to 'kernel/jump_label.c')
| -rw-r--r-- | kernel/jump_label.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c index f2ea678c269f..161301fff97d 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -83,6 +83,7 @@ void static_key_slow_inc(struct static_key *key) { int v, v1; + cpus_read_lock(); STATIC_KEY_CHECK_USE(); /* @@ -99,11 +100,12 @@ void static_key_slow_inc(struct static_key *key) */ for (v = atomic_read(&key->enabled); v > 0; v = v1) { v1 = atomic_cmpxchg(&key->enabled, v, v + 1); - if (likely(v1 == v)) + if (likely(v1 == v)) { + cpus_read_unlock(); return; + } } - cpus_read_lock(); jump_label_lock(); if (atomic_read(&key->enabled) == 0) { atomic_set(&key->enabled, -1); |