Re: [PATCH 1/6] Btrfs: remove superfluous free_extent_buffer

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On 15.05.2018 20:52, Liu Bo wrote:
> @tmp must be NULL at this point, free_extent_buffer is not needed at all.

You need to explain that this code is executed only if
find_extent_buffer didn't return anything, meaning tmp is null,
otherwise it's hard to review this change without looking at the code.

Codewise it's correct:

Reviewed-by: Nikolay Borisov <nborisov@xxxxxxxx>

> 
> Signed-off-by: Liu Bo <bo.liu@xxxxxxxxxxxxxxxxx>
> ---
>  fs/btrfs/ctree.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
> index b3f6f300e492..9fa3d77c98d4 100644
> --- a/fs/btrfs/ctree.c
> +++ b/fs/btrfs/ctree.c
> @@ -2432,7 +2432,6 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level)
>  	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);
>  
> 
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