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authorDavid Matlack <dmatlack@google.com>2016-12-17 01:30:35 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2017-01-12 16:33:16 +0300
commitb6416e61012429e0277bd15a229222fd17afc1c1 (patch)
tree41e04c2694020c223660ddcaf48dec610134aa3a /include
parenta121103c922847ba5010819a3f250f1f7fc84ab8 (diff)
downloadlinux-b6416e61012429e0277bd15a229222fd17afc1c1.tar.xz
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 'include')
-rw-r--r--include/linux/jump_label_ratelimit.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/jump_label_ratelimit.h b/include/linux/jump_label_ratelimit.h
index 089f70f83e97..23da3af459fe 100644
--- a/include/linux/jump_label_ratelimit.h
+++ b/include/linux/jump_label_ratelimit.h
@@ -14,6 +14,7 @@ struct static_key_deferred {
#ifdef HAVE_JUMP_LABEL
extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
+extern void static_key_deferred_flush(struct static_key_deferred *key);
extern void
jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
@@ -26,6 +27,10 @@ static inline void static_key_slow_dec_deferred(struct static_key_deferred *key)
STATIC_KEY_CHECK_USE();
static_key_slow_dec(&key->key);
}
+static inline void static_key_deferred_flush(struct static_key_deferred *key)
+{
+ STATIC_KEY_CHECK_USE();
+}
static inline void
jump_label_rate_limit(struct static_key_deferred *key,
unsigned long rl)