NFSv4: Rename encode_stateid() to encode_open_stateid()

The current version of encode_stateid really only applies to open stateids.
You can't use it for locks, delegations or layouts.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4xdr.c

@@ -1528,7 +1528,7 @@ static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 	hdr->replen += decode_putrootfh_maxsz;
 }
 
-static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
+static void encode_open_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
 {
 	nfs4_stateid stateid;
 	__be32 *p;
@@ -1550,7 +1550,7 @@ static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args,
 	p = reserve_space(xdr, 4);
 	*p = cpu_to_be32(OP_READ);
 
-	encode_stateid(xdr, args->context, args->lock_context,
+	encode_open_stateid(xdr, args->context, args->lock_context,
 		       hdr->minorversion);
 
 	p = reserve_space(xdr, 12);
@@ -1739,7 +1739,7 @@ static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *arg
 	p = reserve_space(xdr, 4);
 	*p = cpu_to_be32(OP_WRITE);
 
-	encode_stateid(xdr, args->context, args->lock_context,
+	encode_open_stateid(xdr, args->context, args->lock_context,
 		       hdr->minorversion);
 
 	p = reserve_space(xdr, 16);