Btrfs: avoid uninit variable warnings in ordered-data.c

This one isn't really an uninit variable, but for pretty
obscure reasons.  Let's make it clearly correct.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 2b61e1ddcd996cbefd5f0e67093c61a2e2f9d19f..083a55477375c7c6b2c83e68fbbb642d4176ae3e 100644 (file)
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -141,7 +141,7 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree,
                                          u64 file_offset)
 {
        struct rb_root *root = &tree->tree;
-       struct rb_node *prev;
+       struct rb_node *prev = NULL;
        struct rb_node *ret;
        struct btrfs_ordered_extent *entry;