include/linux/jump_label_ratelimit.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_JUMP_LABEL_RATELIMIT_H
   3 #define _LINUX_JUMP_LABEL_RATELIMIT_H
   4
   5 #include <linux/jump_label.h>
   6 #include <linux/workqueue.h>
   7
   8 #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
   9 struct static_key_deferred {
  10         struct static_key key;
  11         unsigned long timeout;
  12         struct delayed_work work;
  13 };
  14 #endif
  15
  16 #ifdef HAVE_JUMP_LABEL
  17 extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
  18 extern void static_key_deferred_flush(struct static_key_deferred *key);
  19 extern void
  20 jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
  21
  22 #else   /* !HAVE_JUMP_LABEL */
  23 struct static_key_deferred {
  24         struct static_key  key;
  25 };
  26 static inline void static_key_slow_dec_deferred(struct static_key_deferred *key)
  27 {
  28         STATIC_KEY_CHECK_USE(key);
  29         static_key_slow_dec(&key->key);
  30 }
  31 static inline void static_key_deferred_flush(struct static_key_deferred *key)
  32 {
  33         STATIC_KEY_CHECK_USE(key);
  34 }
  35 static inline void
  36 jump_label_rate_limit(struct static_key_deferred *key,
  37                 unsigned long rl)
  38 {
  39         STATIC_KEY_CHECK_USE(key);
  40 }
  41 #endif  /* HAVE_JUMP_LABEL */
  42 #endif  /* _LINUX_JUMP_LABEL_RATELIMIT_H */