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authorTejun Heo <tj@kernel.org>2015-09-18 11:56:28 -0400
committerTejun Heo <tj@kernel.org>2015-09-18 11:56:28 -0400
commitfa128fd735bd236b6b04d3fedfed7a784137c185 (patch)
tree34b2364ce6da15daf6a3f03864d2d9a9a2baa7c2 /include/linux/jump_label.h
parent3014dde762f618fbcfe899f9ce9e929a2e5aa6dd (diff)
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jump_label: make static_key_enabled() work on static_key_true/false types too
static_key_enabled() can be used on struct static_key but not on its wrapper types static_key_true and static_key_false. The function is useful for debugging and management of static keys. Update it so that it can be used for the wrapper types too. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/jump_label.h')
-rw-r--r--include/linux/jump_label.h18
1 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 7f653e8f6690..c9ca050de846 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -216,11 +216,6 @@ static inline int jump_label_apply_nops(struct module *mod)
#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 static_key_count(key) > 0;
-}
-
static inline void static_key_enable(struct static_key *key)
{
int count = static_key_count(key);
@@ -267,6 +262,17 @@ struct static_key_false {
#define DEFINE_STATIC_KEY_FALSE(name) \
struct static_key_false name = STATIC_KEY_FALSE_INIT
+extern bool ____wrong_branch_error(void);
+
+#define static_key_enabled(x) \
+({ \
+ if (!__builtin_types_compatible_p(typeof(*x), struct static_key) && \
+ !__builtin_types_compatible_p(typeof(*x), struct static_key_true) &&\
+ !__builtin_types_compatible_p(typeof(*x), struct static_key_false)) \
+ ____wrong_branch_error(); \
+ static_key_count((struct static_key *)x) > 0; \
+})
+
#ifdef HAVE_JUMP_LABEL
/*
@@ -325,8 +331,6 @@ struct static_key_false {
* See jump_label_type() / jump_label_init_type().
*/
-extern bool ____wrong_branch_error(void);
-
#define static_branch_likely(x) \
({ \
bool branch; \