101 int __must_check percpu_ref_init(struct percpu_ref *ref,
104 void percpu_ref_exit(struct percpu_ref *ref);
105 void percpu_ref_switch_to_atomic(struct percpu_ref *ref,
107 void percpu_ref_switch_to_atomic_sync(struct percpu_ref *ref);
108 void percpu_ref_switch_to_percpu(struct percpu_ref *ref);
109 void percpu_ref_kill_and_confirm(struct percpu_ref *ref,
111 void percpu_ref_reinit(struct percpu_ref *ref);
125 static inline void percpu_ref_kill(struct percpu_ref *ref)  in percpu_ref_kill()  argument
127 	percpu_ref_kill_and_confirm(ref, NULL);  in percpu_ref_kill()
136 static inline bool __ref_is_percpu(struct percpu_ref *ref,  in __ref_is_percpu()  argument
152 	percpu_ptr = READ_ONCE(ref->percpu_count_ptr);  in __ref_is_percpu()
176 static inline void percpu_ref_get_many(struct percpu_ref *ref, unsigned long nr)  in percpu_ref_get_many()  argument
182 	if (__ref_is_percpu(ref, &percpu_count))  in percpu_ref_get_many()
185 		atomic_long_add(nr, &ref->count);  in percpu_ref_get_many()
198 static inline void percpu_ref_get(struct percpu_ref *ref)  in percpu_ref_get()  argument
200 	percpu_ref_get_many(ref, 1);  in percpu_ref_get()
212 static inline bool percpu_ref_tryget(struct percpu_ref *ref)  in percpu_ref_tryget()  argument
219 	if (__ref_is_percpu(ref, &percpu_count)) {  in percpu_ref_tryget()
223 		ret = atomic_long_inc_not_zero(&ref->count);  in percpu_ref_tryget()
246 static inline bool percpu_ref_tryget_live(struct percpu_ref *ref)  in percpu_ref_tryget_live()  argument
253 	if (__ref_is_percpu(ref, &percpu_count)) {  in percpu_ref_tryget_live()
256 	} else if (!(ref->percpu_count_ptr & __PERCPU_REF_DEAD)) {  in percpu_ref_tryget_live()
257 		ret = atomic_long_inc_not_zero(&ref->count);  in percpu_ref_tryget_live()
275 static inline void percpu_ref_put_many(struct percpu_ref *ref, unsigned long nr)  in percpu_ref_put_many()  argument
281 	if (__ref_is_percpu(ref, &percpu_count))  in percpu_ref_put_many()
283 	else if (unlikely(atomic_long_sub_and_test(nr, &ref->count)))  in percpu_ref_put_many()
284 		ref->release(ref);  in percpu_ref_put_many()
298 static inline void percpu_ref_put(struct percpu_ref *ref)  in percpu_ref_put()  argument
300 	percpu_ref_put_many(ref, 1);  in percpu_ref_put()
312 static inline bool percpu_ref_is_dying(struct percpu_ref *ref)  in percpu_ref_is_dying()  argument
314 	return ref->percpu_count_ptr & __PERCPU_REF_DEAD;  in percpu_ref_is_dying()
325 static inline bool percpu_ref_is_zero(struct percpu_ref *ref)  in percpu_ref_is_zero()  argument
329 	if (__ref_is_percpu(ref, &percpu_count))  in percpu_ref_is_zero()
331 	return !atomic_long_read(&ref->count);  in percpu_ref_is_zero()