linux-kernel - Re: [PATCH 03/12] blkcg: cosmetic updates to blkg

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Date:	Mon, 17 Dec 2012 14:37:53 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	lizefan@...wei.com, axboe@...nel.dk,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, ctalbott@...gle.com, rni@...gle.com
Subject: Re: [PATCH 03/12] blkcg: cosmetic updates to blkg_create()

On Fri, Dec 14, 2012 at 02:41:16PM -0800, Tejun Heo wrote:
> * Rename out_* labels to err_*.
> 
> * Do ERR_PTR() conversion once in the error return path.
> 
> This patch is cosmetic and to prepare for the hierarchy support.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>

Acked-by: Vivek Goyal <vgoyal@...hat.com>

Vivek

> ---
>  block/blk-cgroup.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
> index ffbd237..fde2286 100644
> --- a/block/blk-cgroup.c
> +++ b/block/blk-cgroup.c
> @@ -187,16 +187,16 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
>  
>  	/* blkg holds a reference to blkcg */
>  	if (!css_tryget(&blkcg->css)) {
> -		blkg = ERR_PTR(-EINVAL);
> -		goto out_free;
> +		ret = -EINVAL;
> +		goto err_free_blkg;
>  	}
>  
>  	/* allocate */
>  	if (!new_blkg) {
>  		new_blkg = blkg_alloc(blkcg, q, GFP_ATOMIC);
>  		if (unlikely(!new_blkg)) {
> -			blkg = ERR_PTR(-ENOMEM);
> -			goto out_put;
> +			ret = -ENOMEM;
> +			goto err_put_css;
>  		}
>  	}
>  	blkg = new_blkg;
> @@ -213,12 +213,11 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
>  	if (!ret)
>  		return blkg;
>  
> -	blkg = ERR_PTR(ret);
> -out_put:
> +err_put_css:
>  	css_put(&blkcg->css);
> -out_free:
> +err_free_blkg:
>  	blkg_free(new_blkg);
> -	return blkg;
> +	return ERR_PTR(ret);
>  }
>  
>  /**
> -- 
> 1.7.11.7
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