NFSD: Replace READ* macros in nfsd4_decode_rename()

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs4xdr.c

@@ -1261,22 +1261,12 @@ nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove
 static __be32
 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
 {
-	DECODE_HEAD;
+	__be32 status;
 
-	READ_BUF(4);
-	rename->rn_snamelen = be32_to_cpup(p++);
-	READ_BUF(rename->rn_snamelen);
-	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
-	READ_BUF(4);
-	rename->rn_tnamelen = be32_to_cpup(p++);
-	READ_BUF(rename->rn_tnamelen);
-	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
-	if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
-		return status;
-	if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
+	status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
+	if (status)
 		return status;
-
-	DECODE_TAIL;
+	return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
 }
 
 static __be32