diff options
| -rw-r--r-- | kernel/jump_label.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c index 1f05a19918f4..4d06ec2f3e07 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -132,12 +132,15 @@ bool static_key_fast_inc_not_disabled(struct static_key *key) /* * Negative key->enabled has a special meaning: it sends * static_key_slow_inc/dec() down the slow path, and it is non-zero - * so it counts as "enabled" in jump_label_update(). Note that - * atomic_inc_unless_negative() checks >= 0, so roll our own. + * so it counts as "enabled" in jump_label_update(). + * + * The INT_MAX overflow condition is either used by the networking + * code to reset or detected in the slow path of + * static_key_slow_inc_cpuslocked(). */ v = atomic_read(&key->enabled); do { - if (v <= 0 || (v + 1) < 0) + if (v <= 0 || v == INT_MAX) return false; } while (!likely(atomic_try_cmpxchg(&key->enabled, &v, v + 1))); |