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편집 파일: jump_label_ratelimit.h

/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_JUMP_LABEL_RATELIMIT_H #define _LINUX_JUMP_LABEL_RATELIMIT_H #include <linux/jump_label.h> #include <linux/workqueue.h> #if defined(CONFIG_JUMP_LABEL) struct static_key_deferred { struct static_key key; unsigned long timeout; struct delayed_work work; }; struct static_key_true_deferred { struct static_key_true key; unsigned long timeout; struct delayed_work work; }; struct static_key_false_deferred { struct static_key_false key; unsigned long timeout; struct delayed_work work; }; #define static_key_slow_dec_deferred(x) \ __static_key_slow_dec_deferred(&(x)->key, &(x)->work, (x)->timeout) #define static_branch_slow_dec_deferred(x) \ __static_key_slow_dec_deferred(&(x)->key.key, &(x)->work, (x)->timeout) #define static_key_deferred_flush(x) \ __static_key_deferred_flush((x), &(x)->work) extern void __static_key_slow_dec_deferred(struct static_key *key, struct delayed_work *work, unsigned long timeout); extern void __static_key_deferred_flush(void *key, struct delayed_work *work); extern void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl); extern void jump_label_update_timeout(struct work_struct *work); #define DEFINE_STATIC_KEY_DEFERRED_TRUE(name, rl) \ struct static_key_true_deferred name = { \ .key = { STATIC_KEY_INIT_TRUE }, \ .timeout = (rl), \ .work = __DELAYED_WORK_INITIALIZER((name).work, \ jump_label_update_timeout, \ 0), \ } #define DEFINE_STATIC_KEY_DEFERRED_FALSE(name, rl) \ struct static_key_false_deferred name = { \ .key = { STATIC_KEY_INIT_FALSE }, \ .timeout = (rl), \ .work = __DELAYED_WORK_INITIALIZER((name).work, \ jump_label_update_timeout, \ 0), \ } #else /* !CONFIG_JUMP_LABEL */ struct static_key_deferred { struct static_key key; }; struct static_key_true_deferred { struct static_key_true key; }; struct static_key_false_deferred { struct static_key_false key; }; #define DEFINE_STATIC_KEY_DEFERRED_TRUE(name, rl) \ struct static_key_true_deferred name = { STATIC_KEY_TRUE_INIT } #define DEFINE_STATIC_KEY_DEFERRED_FALSE(name, rl) \ struct static_key_false_deferred name = { STATIC_KEY_FALSE_INIT } #define static_branch_slow_dec_deferred(x) static_branch_dec(&(x)->key) static inline void static_key_slow_dec_deferred(struct static_key_deferred *key) { STATIC_KEY_CHECK_USE(key); static_key_slow_dec(&key->key); } static inline void static_key_deferred_flush(void *key) { STATIC_KEY_CHECK_USE(key); } static inline void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl) { STATIC_KEY_CHECK_USE(key); } #endif /* CONFIG_JUMP_LABEL */ #define static_branch_deferred_inc(x) static_branch_inc(&(x)->key) #endif /* _LINUX_JUMP_LABEL_RATELIMIT_H */