downgrade_write    87 fs/xfs/linux-2.6/mrlock.h 	downgrade_write(&mrp->mr_lock);
downgrade_write    58 include/linux/rwsem.h extern void downgrade_write(struct rw_semaphore *sem);
downgrade_write   223 mm/fremap.c    			downgrade_write(&mm->mmap_sem);
downgrade_write   261 net/rxrpc/ar-local.c 	downgrade_write(&rxrpc_local_sem);