[PATCH] kNFSd: nfsd_acceptable() typo fix

there's a small typo in nfsd_acceptable.  It calls

	err = permission(parent->d_inode, S_IXOTH, NULL);

It really wants to use MAY_EXEC instead of S_IXOTH.  Those happen to be the
same at the moment, but may not do so forever.

From: Olaf Kirch <okir@suse.de>:
From: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/nfsd/nfsfh.c

@@ -56,7 +56,7 @@ int nfsd_acceptable(void *expv, struct dentry *dentry)
 		/* make sure parents give x permission to user */
 		int err;
 		parent = dget_parent(tdentry);
-		err = permission(parent->d_inode, S_IXOTH, NULL);
+		err = permission(parent->d_inode, MAY_EXEC, NULL);
 		if (err < 0) {
 			dput(parent);
 			break;