btrfs: reada, remove pointless BUG_ON in reada_find_extent

The lock is held, we make the same lookup that previously failed with
EEXIST and we don't insert NULL pointers.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index e910bd9b1588612a58ce0dd4eafbfc909ef44436..380ab6629e90412521782398b83fc4b216aa81af 100644 (file)
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -393,7 +393,6 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
        ret = radix_tree_insert(&fs_info->reada_tree, index, re);
        if (ret == -EEXIST) {
                re_exist = radix_tree_lookup(&fs_info->reada_tree, index);
-               BUG_ON(!re_exist);
                re_exist->refcnt++;
                spin_unlock(&fs_info->reada_lock);
                btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);