nfsd: don't open-code clear_and_wake_up_bit

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: jtlayton

fs/nfsd/filecache.c

@@ -1174,9 +1174,7 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		status = nfserr_jukebox;
 	if (status != nfs_ok)
 		nfsd_file_unhash(nf);
-	clear_bit_unlock(NFSD_FILE_PENDING, &nf->nf_flags);
-	smp_mb__after_atomic();
-	wake_up_bit(&nf->nf_flags, NFSD_FILE_PENDING);
+	clear_and_wake_up_bit(NFSD_FILE_PENDING, &nf->nf_flags);
 	goto out;
 }