platform/x86/wmi.c

69 	struct rw_semaphore notify_lock;	/* Protects notify callback add/remove */
592 	down_write(&wblock->notify_lock);
604 	up_write(&wblock->notify_lock);
632 	down_write(&wblock->notify_lock);
644 	up_write(&wblock->notify_lock);
907 	down_write(&wblock->notify_lock);
909 	up_write(&wblock->notify_lock);
919 	down_write(&wblock->notify_lock);
921 	up_write(&wblock->notify_lock);
1048 	init_rwsem(&wblock->notify_lock);
1241 	down_read(&wblock->notify_lock);
1273 	up_read(&wblock->notify_lock);