From 8eedce996556d7d06522cd3a0e6069141c8dffe0 Mon Sep 17 00:00:00 2001 From: Jason Baron Date: Tue, 28 Feb 2012 13:49:01 -0500 Subject: [PATCH] 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 Cc: a.p.zijlstra@chello.nl Cc: rostedt@goodmis.org Cc: mathieu.desnoyers@polymtl.ca Cc: Andrew Morton Cc: Linus Torvalds Link: http://lkml.kernel.org/r/201202281849.q1SIn1p2023270@int-mx10.intmail.prod.int.phx2.redhat.com Signed-off-by: Ingo Molnar --- include/linux/jump_label.h | 11 +++++------ kernel/jump_label.c | 6 ------ 2 files changed, 5 insertions(+), 12 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 */ diff --git a/kernel/jump_label.c b/kernel/jump_label.c index bf9dcadbb53a..43049192b5ec 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -29,12 +29,6 @@ void jump_label_unlock(void) mutex_unlock(&jump_label_mutex); } -bool static_key_enabled(struct static_key *key) -{ - return (atomic_read(&key->enabled) > 0); -} -EXPORT_SYMBOL_GPL(static_key_enabled); - static int jump_label_cmp(const void *a, const void *b) { const struct jump_entry *jea = a;