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| author | David Matlack <dmatlack@google.com> | 2016-12-16 14:30:35 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-01-12 14:33:16 +0100 |
| commit | b6416e61012429e0277bd15a229222fd17afc1c1 (patch) | |
| tree | 41e04c2694020c223660ddcaf48dec610134aa3a /kernel/jump_label.c | |
| parent | a121103c922847ba5010819a3f250f1f7fc84ab8 (diff) | |
| download | linux-b6416e61012429e0277bd15a229222fd17afc1c1.tar.gz | |
jump_labels: API for flushing deferred jump label updates
Modules that use static_key_deferred need a way to synchronize with
any delayed work that is still pending when the module is unloaded.
Introduce static_key_deferred_flush() which flushes any pending
jump label updates.
Signed-off-by: David Matlack <dmatlack@google.com>
Cc: stable@vger.kernel.org
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'kernel/jump_label.c')
| -rw-r--r-- | kernel/jump_label.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c index 93ad6c1fb9b6..a9b8cf500591 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -182,6 +182,13 @@ void static_key_slow_dec_deferred(struct static_key_deferred *key) } EXPORT_SYMBOL_GPL(static_key_slow_dec_deferred); +void static_key_deferred_flush(struct static_key_deferred *key) +{ + STATIC_KEY_CHECK_USE(); + flush_delayed_work(&key->work); +} +EXPORT_SYMBOL_GPL(static_key_deferred_flush); + void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl) { |