55 static inline void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
58 	do old = rw->lock;  in arch_read_lock()
59 	while (!old || __sl_cas(&rw->lock, old, old-1) != old);  in arch_read_lock()
62 static inline void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
65 	do old = rw->lock;  in arch_read_unlock()
66 	while (__sl_cas(&rw->lock, old, old+1) != old);  in arch_read_unlock()
69 static inline void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
71 	while (__sl_cas(&rw->lock, RW_LOCK_BIAS, 0) != RW_LOCK_BIAS);  in arch_write_lock()
74 static inline void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
76 	__sl_cas(&rw->lock, 0, RW_LOCK_BIAS);  in arch_write_unlock()
79 static inline int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
82 	do old = rw->lock;  in arch_read_trylock()
83 	while (old && __sl_cas(&rw->lock, old, old-1) != old);  in arch_read_trylock()
87 static inline int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
89 	return __sl_cas(&rw->lock, RW_LOCK_BIAS, 0) == RW_LOCK_BIAS;  in arch_write_trylock()