53 static __always_inline int rwbase_read_trylock(struct rwbase_rt *rwb)  in rwbase_read_trylock()  argument
61 	for (r = atomic_read(&rwb->readers); r < 0;) {  in rwbase_read_trylock()
63 		if (likely(atomic_try_cmpxchg(&rwb->readers, &r, r + 1)))  in rwbase_read_trylock()
69 static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,  in __rwbase_read_lock()  argument
72 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in __rwbase_read_lock()
80 	if (atomic_read(&rwb->readers) != WRITER_BIAS) {  in __rwbase_read_lock()
81 		atomic_inc(&rwb->readers);  in __rwbase_read_lock()
130 		atomic_inc(&rwb->readers);  in __rwbase_read_lock()
137 static __always_inline int rwbase_read_lock(struct rwbase_rt *rwb,  in rwbase_read_lock()  argument
140 	if (rwbase_read_trylock(rwb))  in rwbase_read_lock()
143 	return __rwbase_read_lock(rwb, state);  in rwbase_read_lock()
146 static void __sched __rwbase_read_unlock(struct rwbase_rt *rwb,  in __rwbase_read_unlock()  argument
149 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in __rwbase_read_unlock()
166 static __always_inline void rwbase_read_unlock(struct rwbase_rt *rwb,  in rwbase_read_unlock()  argument
175 	if (unlikely(atomic_dec_and_test(&rwb->readers)))  in rwbase_read_unlock()
176 		__rwbase_read_unlock(rwb, state);  in rwbase_read_unlock()
179 static inline void __rwbase_write_unlock(struct rwbase_rt *rwb, int bias,  in __rwbase_write_unlock()  argument
182 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in __rwbase_write_unlock()
188 	(void)atomic_add_return_release(READER_BIAS - bias, &rwb->readers);  in __rwbase_write_unlock()
193 static inline void rwbase_write_unlock(struct rwbase_rt *rwb)  in rwbase_write_unlock()  argument
195 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in rwbase_write_unlock()
199 	__rwbase_write_unlock(rwb, WRITER_BIAS, flags);  in rwbase_write_unlock()
202 static inline void rwbase_write_downgrade(struct rwbase_rt *rwb)  in rwbase_write_downgrade()  argument
204 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in rwbase_write_downgrade()
209 	__rwbase_write_unlock(rwb, WRITER_BIAS - 1, flags);  in rwbase_write_downgrade()
212 static inline bool __rwbase_write_trylock(struct rwbase_rt *rwb)  in __rwbase_write_trylock()  argument
215 	lockdep_assert_held(&rwb->rtmutex.wait_lock);  in __rwbase_write_trylock()
221 	if (!atomic_read_acquire(&rwb->readers)) {  in __rwbase_write_trylock()
222 		atomic_set(&rwb->readers, WRITER_BIAS);  in __rwbase_write_trylock()
229 static int __sched rwbase_write_lock(struct rwbase_rt *rwb,  in rwbase_write_lock()  argument
232 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in rwbase_write_lock()
240 	atomic_sub(READER_BIAS, &rwb->readers);  in rwbase_write_lock()
243 	if (__rwbase_write_trylock(rwb))  in rwbase_write_lock()
251 			__rwbase_write_unlock(rwb, 0, flags);  in rwbase_write_lock()
255 		if (__rwbase_write_trylock(rwb))  in rwbase_write_lock()
271 static inline int rwbase_write_trylock(struct rwbase_rt *rwb)  in rwbase_write_trylock()  argument
273 	struct rt_mutex_base *rtm = &rwb->rtmutex;  in rwbase_write_trylock()
279 	atomic_sub(READER_BIAS, &rwb->readers);  in rwbase_write_trylock()
282 	if (__rwbase_write_trylock(rwb)) {  in rwbase_write_trylock()
286 	__rwbase_write_unlock(rwb, 0, flags);  in rwbase_write_trylock()