Btrfs: Compile warning fixup in volume.c

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

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 6d8dd4438c76..b38187573108 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -547,7 +547,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans,
         struct extent_buffer *leaf;
         struct btrfs_key key;
         unsigned long ptr;
-        u64 free_devid;
+        u64 free_devid = 0;
 
         root = root->fs_info->chunk_root;