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authorDavid Matlack <dmatlack@google.com>2016-12-16 14:30:35 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2017-01-12 14:33:16 +0100
commitb6416e61012429e0277bd15a229222fd17afc1c1 (patch)
tree41e04c2694020c223660ddcaf48dec610134aa3a /kernel
parenta121103c922847ba5010819a3f250f1f7fc84ab8 (diff)
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')
-rw-r--r--kernel/jump_label.c7
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)
{