NFSD: Using type of uint32_t for ex_nflavors instead of int

ex_nflavors can't be negative number, just defined by uint32_t.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/export.c

@@ -438,13 +438,14 @@ fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
 
 static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
 {
-	int listsize, err;
 	struct exp_flavor_info *f;
+	u32 listsize;
+	int err;
 
-	err = get_int(mesg, &listsize);
+	err = get_uint(mesg, &listsize);
 	if (err)
 		return err;
-	if (listsize < 0 || listsize > MAX_SECINFO_LIST)
+	if (listsize > MAX_SECINFO_LIST)
 		return -EINVAL;
 
 	for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) {

fs/nfsd/export.h

@@ -54,7 +54,7 @@ struct svc_export {
 	int			ex_fsid;
 	unsigned char *		ex_uuid; /* 16 byte fsid */
 	struct nfsd4_fs_locations ex_fslocs;
-	int			ex_nflavors;
+	uint32_t		ex_nflavors;
 	struct exp_flavor_info	ex_flavors[MAX_SECINFO_LIST];
 	struct cache_detail	*cd;
 };