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authorJason Baron <jbaron@redhat.com>2012-02-28 22:49:01 +0400
committerIngo Molnar <mingo@elte.hu>2012-02-28 23:01:08 +0400
commit8eedce996556d7d06522cd3a0e6069141c8dffe0 (patch)
tree1b24c85bd91fed430b3fbdec195fc1d35751e28f /include/linux/jump_label.h
parenta706d4fc9e56d8e46393533e0cdca2d35fa5c7e5 (diff)
downloadlinux-8eedce996556d7d06522cd3a0e6069141c8dffe0.tar.xz
static keys: Inline the static_key_enabled() function
In the jump label enabled case, calling static_key_enabled() results in a function call. The function returns the results of a compare, so it really doesn't need the overhead of a full function call. Let's make it 'static inline' for both the jump label enabled and disabled cases. Signed-off-by: Jason Baron <jbaron@redhat.com> Cc: a.p.zijlstra@chello.nl Cc: rostedt@goodmis.org Cc: mathieu.desnoyers@polymtl.ca Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/201202281849.q1SIn1p2023270@int-mx10.intmail.prod.int.phx2.redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/jump_label.h')
-rw-r--r--include/linux/jump_label.h11
1 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 2172da2d9bb4..c513a40510f5 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -127,7 +127,6 @@ extern int jump_label_text_reserved(void *start, void *end);
extern void static_key_slow_inc(struct static_key *key);
extern void static_key_slow_dec(struct static_key *key);
extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
-extern bool static_key_enabled(struct static_key *key);
extern void jump_label_apply_nops(struct module *mod);
extern void
jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
@@ -198,11 +197,6 @@ static inline int jump_label_text_reserved(void *start, void *end)
static inline void jump_label_lock(void) {}
static inline void jump_label_unlock(void) {}
-static inline bool static_key_enabled(struct static_key *key)
-{
- return (atomic_read(&key->enabled) > 0);
-}
-
static inline int jump_label_apply_nops(struct module *mod)
{
return 0;
@@ -224,4 +218,9 @@ jump_label_rate_limit(struct static_key_deferred *key,
#define STATIC_KEY_INIT STATIC_KEY_INIT_FALSE
#define jump_label_enabled static_key_enabled
+static inline bool static_key_enabled(struct static_key *key)
+{
+ return (atomic_read(&key->enabled) > 0);
+}
+
#endif /* _LINUX_JUMP_LABEL_H */