Gah, fix the code to match the comment. For non-open lookups use a

shared vnode lock for the leaf vnode if LOCKSHARED is set.

Submitted by:	rdivacky

sys/kern/vfs_lookup.c

@@ -385,7 +385,7 @@ needs_exclusive_leaf(struct mount *mp, int flags)
 	 * Lookup requests outside of open() that specify LOCKSHARED
 	 * only need a shared lock on the leaf vnode.
 	 */
-	return (1);
+	return (0);
 }
 
 /*