NFSD: Adjust filename length argument of nfsd_lookup

Clean up: adjust the sign of the length argument of nfsd_lookup and
nfsd_lookup_dentry, for consistency with recent changes.  NFSD version
4 callers already pass an unsigned file name length.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-By: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

fs/nfsd/vfs.c

@@ -132,7 +132,7 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 
 __be32
 nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
-		   const char *name, int len,
+		   const char *name, unsigned int len,
 		   struct svc_export **exp_ret, struct dentry **dentry_ret)
 {
 	struct svc_export	*exp;
@@ -226,7 +226,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
  */
 __be32
 nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
-					int len, struct svc_fh *resfh)
+				unsigned int len, struct svc_fh *resfh)
 {
 	struct svc_export	*exp;
 	struct dentry		*dentry;

include/linux/nfsd/nfsd.h

@@ -70,9 +70,9 @@ void		nfsd_racache_shutdown(void);
 int		nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 		                struct svc_export **expp);
 __be32		nfsd_lookup(struct svc_rqst *, struct svc_fh *,
-				const char *, int, struct svc_fh *);
+				const char *, unsigned int, struct svc_fh *);
 __be32		 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
-				const char *, int,
+				const char *, unsigned int,
 				struct svc_export **, struct dentry **);
 __be32		nfsd_setattr(struct svc_rqst *, struct svc_fh *,
 				struct iattr *, int, time_t);