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b6416e6101
Modules that use static_key_deferred need a way to synchronize with any delayed work that is still pending when the module is unloaded. Introduce static_key_deferred_flush() which flushes any pending jump label updates. Signed-off-by: David Matlack <dmatlack@google.com> Cc: stable@vger.kernel.org Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#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(CC_HAVE_ASM_GOTO) && 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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#endif
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#ifdef HAVE_JUMP_LABEL
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extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
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extern void static_key_deferred_flush(struct static_key_deferred *key);
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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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#else /* !HAVE_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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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();
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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(struct static_key_deferred *key)
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{
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STATIC_KEY_CHECK_USE();
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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();
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}
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#endif /* HAVE_JUMP_LABEL */
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#endif /* _LINUX_JUMP_LABEL_RATELIMIT_H */
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