From: David Sterba <dsterba@suse.com>
Date: Tue, 8 Nov 2016 16:11:27 +0000 (+0100)
Subject: btrfs: reada, remove pointless BUG_ON in reada_find_extent
X-Git-Tag: v4.10-rc1~68^2~24^2~32
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8694bb61360554e751f43688a9ff1793609884c4;p=linux.git

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 e910bd9b1588..380ab6629e90 100644
--- 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);