Re: [PATCH] bdi: fix cleanup when fail to percpu_counter_init

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On Sat 16-09-17 02:27:05, weiping zhang wrote:
> when percpu_counter_init fail at i, 0 ~ (i-1) should be destoried, not
> 1 ~ i.
> 
> Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>

Good catch. You can add:

Reviewed-by: Jan Kara <jack@xxxxxxx>

								Honza

> ---
>  mm/backing-dev.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/backing-dev.c b/mm/backing-dev.c
> index e19606b..d399d3c 100644
> --- a/mm/backing-dev.c
> +++ b/mm/backing-dev.c
> @@ -334,7 +334,7 @@ static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi,
>  	return 0;
>  
>  out_destroy_stat:
> -	while (i--)
> +	while (--i >= 0)
>  		percpu_counter_destroy(&wb->stat[i]);
>  	fprop_local_destroy_percpu(&wb->completions);
>  out_put_cong:
> -- 
> 2.9.4
> 
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR

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