diff options
Diffstat (limited to 'include/linux/jump_label.h')
| -rw-r--r-- | include/linux/jump_label.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index a5079072da6..39999775b92 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -48,6 +48,13 @@ #include <linux/types.h> #include <linux/compiler.h> +#include <linux/bug.h> + +extern bool static_key_initialized; + +#define STATIC_KEY_CHECK_USE() WARN(!static_key_initialized, \ + "%s used before call to jump_label_init", \ + __func__) #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) @@ -128,29 +135,32 @@ struct static_key { static __always_inline void jump_label_init(void) { + static_key_initialized = true; } static __always_inline bool static_key_false(struct static_key *key) { - if (unlikely(atomic_read(&key->enabled)) > 0) + if (unlikely(atomic_read(&key->enabled) > 0)) return true; return false; } static __always_inline bool static_key_true(struct static_key *key) { - if (likely(atomic_read(&key->enabled)) > 0) + if (likely(atomic_read(&key->enabled) > 0)) return true; return false; } static inline void static_key_slow_inc(struct static_key *key) { + STATIC_KEY_CHECK_USE(); atomic_inc(&key->enabled); } static inline void static_key_slow_dec(struct static_key *key) { + STATIC_KEY_CHECK_USE(); atomic_dec(&key->enabled); } |