diff options
Diffstat (limited to 'include/linux/jump_label.h')
| -rw-r--r-- | include/linux/jump_label.h | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index 66f23dc5e76..5ce8b140428 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -3,6 +3,7 @@ #include <linux/types.h> #include <linux/compiler.h> +#include <linux/workqueue.h> #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) @@ -14,9 +15,15 @@ struct jump_label_key { #endif }; +struct jump_label_key_deferred { + struct jump_label_key key; + unsigned long timeout; + struct delayed_work work; +}; + # include <asm/jump_label.h> # define HAVE_JUMP_LABEL -#endif +#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */ enum jump_label_type { JUMP_LABEL_DISABLE = 0, @@ -28,9 +35,9 @@ struct module; #ifdef HAVE_JUMP_LABEL #ifdef CONFIG_MODULES -#define JUMP_LABEL_INIT {{ 0 }, NULL, NULL} +#define JUMP_LABEL_INIT {ATOMIC_INIT(0), NULL, NULL} #else -#define JUMP_LABEL_INIT {{ 0 }, NULL} +#define JUMP_LABEL_INIT {ATOMIC_INIT(0), NULL} #endif static __always_inline bool static_branch(struct jump_label_key *key) @@ -41,18 +48,23 @@ static __always_inline bool static_branch(struct jump_label_key *key) extern struct jump_entry __start___jump_table[]; extern struct jump_entry __stop___jump_table[]; +extern void jump_label_init(void); extern void jump_label_lock(void); extern void jump_label_unlock(void); extern void arch_jump_label_transform(struct jump_entry *entry, - enum jump_label_type type); -extern void arch_jump_label_text_poke_early(jump_label_t addr); + enum jump_label_type type); +extern void arch_jump_label_transform_static(struct jump_entry *entry, + enum jump_label_type type); extern int jump_label_text_reserved(void *start, void *end); extern void jump_label_inc(struct jump_label_key *key); extern void jump_label_dec(struct jump_label_key *key); +extern void jump_label_dec_deferred(struct jump_label_key_deferred *key); extern bool jump_label_enabled(struct jump_label_key *key); extern void jump_label_apply_nops(struct module *mod); +extern void jump_label_rate_limit(struct jump_label_key_deferred *key, + unsigned long rl); -#else +#else /* !HAVE_JUMP_LABEL */ #include <linux/atomic.h> @@ -62,6 +74,14 @@ struct jump_label_key { atomic_t enabled; }; +static __always_inline void jump_label_init(void) +{ +} + +struct jump_label_key_deferred { + struct jump_label_key key; +}; + static __always_inline bool static_branch(struct jump_label_key *key) { if (unlikely(atomic_read(&key->enabled))) @@ -79,6 +99,11 @@ static inline void jump_label_dec(struct jump_label_key *key) atomic_dec(&key->enabled); } +static inline void jump_label_dec_deferred(struct jump_label_key_deferred *key) +{ + jump_label_dec(&key->key); +} + static inline int jump_label_text_reserved(void *start, void *end) { return 0; @@ -97,6 +122,13 @@ static inline int jump_label_apply_nops(struct module *mod) return 0; } -#endif +static inline void jump_label_rate_limit(struct jump_label_key_deferred *key, + unsigned long rl) +{ +} +#endif /* HAVE_JUMP_LABEL */ -#endif +#define jump_label_key_enabled ((struct jump_label_key){ .enabled = ATOMIC_INIT(1), }) +#define jump_label_key_disabled ((struct jump_label_key){ .enabled = ATOMIC_INIT(0), }) + +#endif /* _LINUX_JUMP_LABEL_H */ |