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/* 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 */
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