73 static  __inline__ void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
77 	arch_spin_lock_flags(&rw->lock, flags);  in arch_read_lock()
78 	rw->counter++;  in arch_read_lock()
79 	arch_spin_unlock(&rw->lock);  in arch_read_lock()
85 static  __inline__ void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
89 	arch_spin_lock_flags(&rw->lock, flags);  in arch_read_unlock()
90 	rw->counter--;  in arch_read_unlock()
91 	arch_spin_unlock(&rw->lock);  in arch_read_unlock()
97 static __inline__ int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
102 	if (arch_spin_trylock(&rw->lock)) {  in arch_read_trylock()
103 		rw->counter++;  in arch_read_trylock()
104 		arch_spin_unlock(&rw->lock);  in arch_read_trylock()
111 	if (rw->counter < 0)  in arch_read_trylock()
115 	while (arch_spin_is_locked(&rw->lock) && rw->counter >= 0)  in arch_read_trylock()
123 static __inline__ void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
128 	arch_spin_lock_flags(&rw->lock, flags);  in arch_write_lock()
130 	if (rw->counter != 0) {  in arch_write_lock()
131 		arch_spin_unlock(&rw->lock);  in arch_write_lock()
134 		while (rw->counter != 0)  in arch_write_lock()
140 	rw->counter = -1; /* mark as write-locked */  in arch_write_lock()
145 static __inline__ void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
147 	rw->counter = 0;  in arch_write_unlock()
148 	arch_spin_unlock(&rw->lock);  in arch_write_unlock()
153 static __inline__ int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
159 	if (arch_spin_trylock(&rw->lock)) {  in arch_write_trylock()
160 		if (rw->counter == 0) {  in arch_write_trylock()
161 			rw->counter = -1;  in arch_write_trylock()
165 			arch_spin_unlock(&rw->lock);  in arch_write_trylock()