diff options
Diffstat (limited to 'include/linux/jump_label.h')
| -rw-r--r-- | include/linux/jump_label.h | 46 |
1 files changed, 28 insertions, 18 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index 0536524bb9eb..661af564fae8 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -76,7 +76,6 @@ #include <linux/types.h> #include <linux/compiler.h> -#include <linux/bug.h> extern bool static_key_initialized; @@ -115,13 +114,6 @@ enum jump_label_type { struct module; -#include <linux/atomic.h> - -static inline int static_key_count(struct static_key *key) -{ - return atomic_read(&key->enabled); -} - #ifdef HAVE_JUMP_LABEL #define JUMP_TYPE_FALSE 0UL @@ -152,16 +144,34 @@ 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 jump_label_apply_nops(struct module *mod); +extern int static_key_count(struct static_key *key); +extern void static_key_enable(struct static_key *key); +extern void static_key_disable(struct static_key *key); +/* + * We should be using ATOMIC_INIT() for initializing .enabled, but + * the inclusion of atomic.h is problematic for inclusion of jump_label.h + * in 'low-level' headers. Thus, we are initializing .enabled with a + * raw value, but have added a BUILD_BUG_ON() to catch any issues in + * jump_label_init() see: kernel/jump_label.c. + */ #define STATIC_KEY_INIT_TRUE \ - { .enabled = ATOMIC_INIT(1), \ + { .enabled = { 1 }, \ .entries = (void *)JUMP_TYPE_TRUE } #define STATIC_KEY_INIT_FALSE \ - { .enabled = ATOMIC_INIT(0), \ + { .enabled = { 0 }, \ .entries = (void *)JUMP_TYPE_FALSE } #else /* !HAVE_JUMP_LABEL */ +#include <linux/atomic.h> +#include <linux/bug.h> + +static inline int static_key_count(struct static_key *key) +{ + return atomic_read(&key->enabled); +} + static __always_inline void jump_label_init(void) { static_key_initialized = true; @@ -206,14 +216,6 @@ static inline int jump_label_apply_nops(struct module *mod) return 0; } -#define STATIC_KEY_INIT_TRUE { .enabled = ATOMIC_INIT(1) } -#define STATIC_KEY_INIT_FALSE { .enabled = ATOMIC_INIT(0) } - -#endif /* HAVE_JUMP_LABEL */ - -#define STATIC_KEY_INIT STATIC_KEY_INIT_FALSE -#define jump_label_enabled static_key_enabled - static inline void static_key_enable(struct static_key *key) { int count = static_key_count(key); @@ -234,6 +236,14 @@ static inline void static_key_disable(struct static_key *key) static_key_slow_dec(key); } +#define STATIC_KEY_INIT_TRUE { .enabled = ATOMIC_INIT(1) } +#define STATIC_KEY_INIT_FALSE { .enabled = ATOMIC_INIT(0) } + +#endif /* HAVE_JUMP_LABEL */ + +#define STATIC_KEY_INIT STATIC_KEY_INIT_FALSE +#define jump_label_enabled static_key_enabled + /* -------------------------------------------------------------------------- */ /* |