Linux Audio
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Embedded Linux Audio
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#ifndef _LINUX_JUMP_LABEL_H #define _LINUX_JUMP_LABEL_H #include <linux/types.h> #include <linux/compiler.h> #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) struct jump_label_key { atomic_t enabled; struct jump_entry *entries; #ifdef CONFIG_MODULES struct jump_label_mod *next; #endif }; # include <asm/jump_label.h> # define HAVE_JUMP_LABEL #endif enum jump_label_type { JUMP_LABEL_DISABLE = 0, JUMP_LABEL_ENABLE, }; struct module; #ifdef HAVE_JUMP_LABEL #ifdef CONFIG_MODULES #define JUMP_LABEL_INIT {{ 0 }, NULL, NULL} #else #define JUMP_LABEL_INIT {{ 0 }, NULL} #endif static __always_inline bool static_branch(struct jump_label_key *key) { return arch_static_branch(key); } extern struct jump_entry __start___jump_table[]; extern struct jump_entry __stop___jump_table[]; 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); 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 bool jump_label_enabled(struct jump_label_key *key); extern void jump_label_apply_nops(struct module *mod); #else #include <asm/atomic.h> #define JUMP_LABEL_INIT {ATOMIC_INIT(0)} struct jump_label_key { atomic_t enabled; }; static __always_inline bool static_branch(struct jump_label_key *key) { if (unlikely(atomic_read(&key->enabled))) return true; return false; } static inline void jump_label_inc(struct jump_label_key *key) { atomic_inc(&key->enabled); } static inline void jump_label_dec(struct jump_label_key *key) { atomic_dec(&key->enabled); } static inline int jump_label_text_reserved(void *start, void *end) { return 0; } static inline void jump_label_lock(void) {} static inline void jump_label_unlock(void) {} static inline bool jump_label_enabled(struct jump_label_key *key) { return !!atomic_read(&key->enabled); } static inline int jump_label_apply_nops(struct module *mod) { return 0; } #endif #endif