Lines Matching defs:rw

118 #define arch_read_relax(rw) barrier()
119 #define arch_write_relax(rw) barrier()
124 static inline void arch_read_lock(arch_rwlock_t *rw)
128 	old = __atomic_add(1, &rw->cnts);
130 		arch_read_lock_wait(rw);
133 static inline void arch_read_unlock(arch_rwlock_t *rw)
135 	__atomic_add_const_barrier(-1, &rw->cnts);
138 static inline void arch_write_lock(arch_rwlock_t *rw)
142 	if (!arch_try_cmpxchg(&rw->cnts, &old, 0x30000))
143 		arch_write_lock_wait(rw);
146 static inline void arch_write_unlock(arch_rwlock_t *rw)
148 	__atomic_add_barrier(-0x30000, &rw->cnts);
152 static inline int arch_read_trylock(arch_rwlock_t *rw)
156 	old = READ_ONCE(rw->cnts);
157 	return (!(old & 0xffff0000) && arch_try_cmpxchg(&rw->cnts, &old, old + 1));
160 static inline int arch_write_trylock(arch_rwlock_t *rw)
164 	old = READ_ONCE(rw->cnts);
165 	return !old && arch_try_cmpxchg(&rw->cnts, &old, 0x30000);