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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>
This commit is contained in:
David Sterba 2016-11-08 17:11:27 +01:00
parent fc2e901f26
commit 8694bb6136
1 changed files with 0 additions and 1 deletions
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fs/btrfs/reada.c
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@ -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);