kbuild: Fix computing srcversion for modules

[mv-sheeva.git] / fs / btrfs / ctree.c

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 9ac17159925819a399dc10413d5261dd67bb5584..b5baff0dccfec40c360397c0d1e47380aea51ae2 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -105,6 +105,8 @@ noinline void btrfs_clear_path_blocking(struct btrfs_path *p,
 /* this also releases the path */
 void btrfs_free_path(struct btrfs_path *p)
 {
+       if (!p)
+               return;
        btrfs_release_path(NULL, p);
        kmem_cache_free(btrfs_path_cachep, p);
 }
@@ -2514,6 +2516,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
        btrfs_assert_tree_locked(path->nodes[1]);
 
        right = read_node_slot(root, upper, slot + 1);
+       if (right == NULL)
+               return 1;
+
        btrfs_tree_lock(right);
        btrfs_set_lock_blocking(right);
 
@@ -2764,6 +2769,9 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
        btrfs_assert_tree_locked(path->nodes[1]);
 
        left = read_node_slot(root, path->nodes[1], slot - 1);
+       if (left == NULL)
+               return 1;
+
        btrfs_tree_lock(left);
        btrfs_set_lock_blocking(left);