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);