69 static  __inline__ void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
73 	arch_spin_lock_flags(&rw->lock, flags);  in arch_read_lock()
74 	rw->counter++;  in arch_read_lock()
75 	arch_spin_unlock(&rw->lock);  in arch_read_lock()
81 static  __inline__ void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
85 	arch_spin_lock_flags(&rw->lock, flags);  in arch_read_unlock()
86 	rw->counter--;  in arch_read_unlock()
87 	arch_spin_unlock(&rw->lock);  in arch_read_unlock()
93 static __inline__ int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
98 	if (arch_spin_trylock(&rw->lock)) {  in arch_read_trylock()
99 		rw->counter++;  in arch_read_trylock()
100 		arch_spin_unlock(&rw->lock);  in arch_read_trylock()
107 	if (rw->counter < 0)  in arch_read_trylock()
111 	while (arch_spin_is_locked(&rw->lock) && rw->counter >= 0)  in arch_read_trylock()
119 static __inline__ void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
124 	arch_spin_lock_flags(&rw->lock, flags);  in arch_write_lock()
126 	if (rw->counter != 0) {  in arch_write_lock()
127 		arch_spin_unlock(&rw->lock);  in arch_write_lock()
130 		while (rw->counter != 0)  in arch_write_lock()
136 	rw->counter = -1; /* mark as write-locked */  in arch_write_lock()
141 static __inline__ void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
143 	rw->counter = 0;  in arch_write_unlock()
144 	arch_spin_unlock(&rw->lock);  in arch_write_unlock()
149 static __inline__ int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
155 	if (arch_spin_trylock(&rw->lock)) {  in arch_write_trylock()
156 		if (rw->counter == 0) {  in arch_write_trylock()
157 			rw->counter = -1;  in arch_write_trylock()
161 			arch_spin_unlock(&rw->lock);  in arch_write_trylock()