99 static inline int arch_read_can_lock(arch_rwlock_t *rw)  in arch_read_can_lock()  argument
101 	return !arch_write_val_locked(rw->lock);  in arch_read_can_lock()
108 static inline int arch_write_can_lock(arch_rwlock_t *rw)  in arch_write_can_lock()  argument
110 	return rw->lock == 0;  in arch_write_can_lock()
113 extern void __read_lock_failed(arch_rwlock_t *rw);
115 static inline void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
117 	u32 val = __insn_fetchaddgez4(&rw->lock, 1);  in arch_read_lock()
119 		__read_lock_failed(rw);  in arch_read_lock()
122 extern void __write_lock_failed(arch_rwlock_t *rw, u32 val);
124 static inline void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
126 	u32 val = __insn_fetchor4(&rw->lock, __WRITE_LOCK_BIT);  in arch_write_lock()
128 		__write_lock_failed(rw, val);  in arch_write_lock()
131 static inline void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
134 	__insn_fetchadd4(&rw->lock, -1);  in arch_read_unlock()
137 static inline void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
140 	__insn_exch4(&rw->lock, 0);  /* Avoid waiting in the write buffer. */  in arch_write_unlock()
143 static inline int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
145 	return !arch_write_val_locked(__insn_fetchaddgez4(&rw->lock, 1));  in arch_read_trylock()
148 static inline int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
150 	u32 val = __insn_fetchor4(&rw->lock, __WRITE_LOCK_BIT);  in arch_write_trylock()
154 		__insn_fetchand4(&rw->lock, ~__WRITE_LOCK_BIT);  in arch_write_trylock()