nfsd: drop the nfsd4_fattr_args "size" field

We already have a slot for this in the kstat structure. Just overwrite
that instead of keeping a copy.

Signed-off-by: Jeff Layton <[e-mail]>
Signed-off-by: Chuck Lever <[e-mail]>

fs/nfsd/nfs4xdr.c

···
 	struct kstat		stat;
 	struct kstatfs		statfs;
 	struct nfs4_acl		*acl;
-	u64			size;
 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 	void			*context;
 	int			contextlen;
···
 static __be32 nfsd4_encode_fattr4_size(struct xdr_stream *xdr,
 				       const struct nfsd4_fattr_args *args)
 {
-	return nfsd4_encode_uint64_t(xdr, args->size);
+	return nfsd4_encode_uint64_t(xdr, args->stat.size);
 }
 
 static __be32 nfsd4_encode_fattr4_fsid(struct xdr_stream *xdr,
···
 		if (status)
 			goto out;
 	}
-	args.size = 0;
 	if (attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
 		status = nfsd4_deleg_getattr_conflict(rqstp, dentry,
 					&file_modified, &size);
···
 	if (err)
 		goto out_nfserr;
 	if (file_modified)
-		args.size = size;
-	else
-		args.size = args.stat.size;
+		args.stat.size = size;
 
 	if (!(args.stat.result_mask & STATX_BTIME))
 		/* underlying FS does not offer btime so we can't share it */