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btrfs: Remove extra reference count bumps in btrfs_compare_trees 

When the 2 comparison trees roots are initialised they are private to
the function and already have reference counts of 1 each. There is no
need to further increment the reference count since the cloned buffers
are already accessed via struct btrfs_path. Eventually the 2 paths used
for comparison are going to be released, effectively disposing of the
cloned buffers.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2018-08-15 18:26:55 +03:00 committed by David Sterba
parent 24cee18a1c
commit 8c7eeb6557
1 changed files with 0 additions and 2 deletions
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2
fs/btrfs/ctree.c
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@ -5388,7 +5388,6 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
ret = -ENOMEM;
goto out;
}
extent_buffer_get(left_path->nodes[left_level]);
right_level = btrfs_header_level(right_root->commit_root);
right_root_level = right_level;
@ -5399,7 +5398,6 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
ret = -ENOMEM;
goto out;
}
extent_buffer_get(right_path->nodes[right_level]);
up_read(&fs_info->commit_root_sem);
if (left_level == 0)