From: Liu Bo <bo.liu@linux.alibaba.com>
Date: Fri, 18 May 2018 03:00:19 +0000 (+0800)
Subject: Btrfs: remove superfluous free_extent_buffer in read_block_for_search
X-Git-Tag: v4.19~584^2~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ca19b4a69962fa850d5a22aa7a335106fcba0473;p=platform%2Fkernel%2Flinux-rpi.git

Btrfs: remove superfluous free_extent_buffer in read_block_for_search

read_block_for_search() can be simplified as:

tmp = find_extent_buffer();
if (tmp)
   return;

...

free_extent_buffer();
read_tree_block();

Apparently, @tmp must be NULL at this point, free_extent_buffer() is not
needed.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8c68961..820226d 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2432,7 +2432,6 @@ read_block_for_search(struct btrfs_root *root, struct btrfs_path *p,
 	btrfs_unlock_up_safe(p, level + 1);
 	btrfs_set_path_blocking(p);
 
-	free_extent_buffer(tmp);
 	if (p->reada != READA_NONE)
 		reada_for_search(fs_info, p, level, slot, key->objectid);