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f01c373fbe
This interface is currently only defined if CONFIG_JUMP_LABEL. Make it available also when jump labels are off. Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_JUMP_LABEL_RATELIMIT_H
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#define _LINUX_JUMP_LABEL_RATELIMIT_H
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#include <linux/jump_label.h>
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#include <linux/workqueue.h>
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#if defined(CONFIG_JUMP_LABEL)
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struct static_key_deferred {
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struct static_key key;
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unsigned long timeout;
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struct delayed_work work;
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};
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struct static_key_true_deferred {
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struct static_key_true key;
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unsigned long timeout;
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struct delayed_work work;
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};
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struct static_key_false_deferred {
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struct static_key_false key;
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unsigned long timeout;
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struct delayed_work work;
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};
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#define static_key_slow_dec_deferred(x) \
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__static_key_slow_dec_deferred(&(x)->key, &(x)->work, (x)->timeout)
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#define static_branch_slow_dec_deferred(x) \
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__static_key_slow_dec_deferred(&(x)->key.key, &(x)->work, (x)->timeout)
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#define static_key_deferred_flush(x) \
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__static_key_deferred_flush((x), &(x)->work)
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extern void
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__static_key_slow_dec_deferred(struct static_key *key,
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struct delayed_work *work,
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unsigned long timeout);
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extern void __static_key_deferred_flush(void *key, struct delayed_work *work);
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extern void
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jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
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extern void jump_label_update_timeout(struct work_struct *work);
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#define DEFINE_STATIC_KEY_DEFERRED_TRUE(name, rl) \
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struct static_key_true_deferred name = { \
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.key = { STATIC_KEY_INIT_TRUE }, \
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.timeout = (rl), \
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.work = __DELAYED_WORK_INITIALIZER((name).work, \
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jump_label_update_timeout, \
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0), \
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}
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#define DEFINE_STATIC_KEY_DEFERRED_FALSE(name, rl) \
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struct static_key_false_deferred name = { \
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.key = { STATIC_KEY_INIT_FALSE }, \
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.timeout = (rl), \
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.work = __DELAYED_WORK_INITIALIZER((name).work, \
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jump_label_update_timeout, \
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0), \
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}
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#else /* !CONFIG_JUMP_LABEL */
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struct static_key_deferred {
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struct static_key key;
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};
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struct static_key_true_deferred {
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struct static_key_true key;
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};
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struct static_key_false_deferred {
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struct static_key_false key;
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};
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#define DEFINE_STATIC_KEY_DEFERRED_TRUE(name, rl) \
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struct static_key_true_deferred name = { STATIC_KEY_TRUE_INIT }
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#define DEFINE_STATIC_KEY_DEFERRED_FALSE(name, rl) \
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struct static_key_false_deferred name = { STATIC_KEY_FALSE_INIT }
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#define static_branch_slow_dec_deferred(x) static_branch_dec(&(x)->key)
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static inline void static_key_slow_dec_deferred(struct static_key_deferred *key)
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{
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STATIC_KEY_CHECK_USE(key);
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static_key_slow_dec(&key->key);
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}
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static inline void static_key_deferred_flush(void *key)
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{
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STATIC_KEY_CHECK_USE(key);
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}
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static inline void
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jump_label_rate_limit(struct static_key_deferred *key,
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unsigned long rl)
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{
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STATIC_KEY_CHECK_USE(key);
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}
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#endif /* CONFIG_JUMP_LABEL */
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#define static_branch_deferred_inc(x) static_branch_inc(&(x)->key)
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#endif /* _LINUX_JUMP_LABEL_RATELIMIT_H */
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