btrfs: Remove impossible BUG_ON in get_tree_block_key

relocate_tree_blocks calls get_tree_block_key for a block iff that block
has its ->key_ready equal false. Thus the BUG_ON in the latter function
cannot ever be triggered so remove it.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 6130ba69bc49e5f79d1c73f1b9cc0e194eefbcb9..ba39f6969a7232251cc077a264f79075c53a4ddd 100644 (file)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3089,7 +3089,6 @@ static int get_tree_block_key(struct btrfs_fs_info *fs_info,
 {
        struct extent_buffer *eb;
 
-       BUG_ON(block->key_ready);
        eb = read_tree_block(fs_info, block->bytenr, block->key.offset,
                             block->level, NULL);
        if (IS_ERR(eb)) {