simplify link_path_walk() tail

Now that link_path_walk() is called without LOOKUP_PARENT
only from do_follow_link(), we can simplify the checks in
last component handling.  First of all, checking if we'd
arrived to a directory is not needed - the caller will check
it anyway.  And LOOKUP_FOLLOW is guaranteed to be there,
since we only get to that place with nd->depth > 0.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

@@ -1467,8 +1467,7 @@ last_component:
 			nd->last_type = type;
 			return 0;
 		}
-		err = walk_component(nd, &next, &this, type,
-					lookup_flags & LOOKUP_FOLLOW);
+		err = walk_component(nd, &next, &this, type, LOOKUP_FOLLOW);
 		if (err < 0)
 			return err;
 		if (err) {
@@ -1476,11 +1475,6 @@ last_component:
 			if (err)
 				return err;
 		}
-		if (lookup_flags & LOOKUP_DIRECTORY) {
-			err = -ENOTDIR; 
-			if (!nd->inode->i_op->lookup)
-				break;
-		}
 		return 0;
 	}
 	terminate_walk(nd);