[PATCH] knfsd cleanups

logics in nfsd_lookup() cleaned up (see above, only more so ;-/)

fs/nfsd/vfs.c

@@ -114,13 +114,12 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 	if (isdotent(name, len)) {
 		if (len==1)
 			dentry = dget(dparent);
-		else  { /* must be ".." */
-			/* checking mountpoint crossing is very different when stepping up */
-			if (dparent == exp->ex_dentry) {
-				if (!EX_CROSSMNT(exp))
+		else if (dparent != exp->ex_dentry)
+			dentry = dget(dparent->d_parent);
+		else  if (!EX_CROSSMNT(exp))
 			dentry = dget(dparent); /* .. == . just like at / */
-				else
-				{
+		else {
+			/* checking mountpoint crossing is very different when stepping up */
 			struct svc_export *exp2 = NULL;
 			struct dentry *dp;
 			struct vfsmount *mnt = mntget(exp->ex_mnt);
@@ -130,10 +129,9 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 			dp = dget(dentry->d_parent);
 			dput(dentry);
 			dentry = dp;
-					for ( ; exp2 == NULL && dp->d_parent != dp;
-					      dp=dp->d_parent)
+			for ( ; !exp2 && dp->d_parent != dp; dp=dp->d_parent)
 				exp2 = exp_get_by_name(exp->ex_client, mnt, dp);
-					if (exp2==NULL) {
+			if (!exp2) {
 				dput(dentry);
 				dentry = dget(dparent);
 			} else {
@@ -141,9 +139,6 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 			}
 			mntput(mnt);
 		}
-			} else
-				dentry = dget(dparent->d_parent);
-		}
 	} else {
 		fh_lock(fhp);
 		dentry = lookup_one_len(name, dparent, len);