NFSD: Remove macros that are no longer used

Now that all the NFSv4 decoder functions have been converted to
make direct calls to the xdr helpers, remove the unused C macros.

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

Author: chucklever

fs/nfsd/nfs4xdr.c

@@ -102,45 +102,6 @@ check_filename(char *str, int len)
 	return 0;
 }
 
-#define DECODE_HEAD				\
-	__be32 *p;				\
-	__be32 status
-#define DECODE_TAIL				\
-	status = 0;				\
-out:						\
-	return status;				\
-xdr_error:					\
-	dprintk("NFSD: xdr error (%s:%d)\n",	\
-			__FILE__, __LINE__);	\
-	status = nfserr_bad_xdr;		\
-	goto out
-
-#define READMEM(x,nbytes) do {			\
-	x = (char *)p;				\
-	p += XDR_QUADLEN(nbytes);		\
-} while (0)
-#define SAVEMEM(x,nbytes) do {			\
-	if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
- 		savemem(argp, p, nbytes) :	\
- 		(char *)p)) {			\
-		dprintk("NFSD: xdr error (%s:%d)\n", \
-				__FILE__, __LINE__); \
-		goto xdr_error;			\
-		}				\
-	p += XDR_QUADLEN(nbytes);		\
-} while (0)
-#define COPYMEM(x,nbytes) do {			\
-	memcpy((x), p, nbytes);			\
-	p += XDR_QUADLEN(nbytes);		\
-} while (0)
-#define READ_BUF(nbytes)			\
-	do {					\
-		p = xdr_inline_decode(argp->xdr,\
-				      nbytes);	\
-		if (!p)				\
-			goto xdr_error;		\
-	} while (0)
-
 static int zero_clientid(clientid_t *clid)
 {
 	return (clid->cl_boot == 0) && (clid->cl_id == 0);
@@ -5461,7 +5422,6 @@ nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
 	struct nfsd4_compoundargs *args = rqstp->rq_argp;
 
 	/* svcxdr_tmp_alloc */
-	args->tmpp = NULL;
 	args->to_free = NULL;
 
 	args->xdr = &rqstp->rq_arg_stream;

fs/nfsd/xdr4.h

@@ -386,13 +386,6 @@ struct nfsd4_setclientid_confirm {
 	nfs4_verifier	sc_confirm;
 };
 
-struct nfsd4_saved_compoundargs {
-	__be32 *p;
-	__be32 *end;
-	int pagelen;
-	struct page **pagelist;
-};
-
 struct nfsd4_test_stateid_id {
 	__be32			ts_id_status;
 	stateid_t		ts_id_stateid;
@@ -696,8 +689,6 @@ struct svcxdr_tmpbuf {
 
 struct nfsd4_compoundargs {
 	/* scratch variables for XDR decode */
-	__be32				tmp[8];
-	__be32 *			tmpp;
 	struct xdr_stream		*xdr;
 	struct svcxdr_tmpbuf		*to_free;
 	struct svc_rqst			*rqstp;