linux-kernel - Re: [PATCH] lightnvm: place unlock sentence in the common path

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Date:	Fri, 4 Dec 2015 13:50:31 +0100
From:	Matias Bjørling <mb@...htnvm.io>
To:	Wenwei Tao <ww.tao0320@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH] lightnvm: place unlock sentence in the common path

On 12/04/2015 01:37 PM, Wenwei Tao wrote:
> move spin_unlock(&vlun->lock) to common path to make
> the code more clean.
>
> Signed-off-by: Wenwei Tao <ww.tao0320@...il.com>
> ---
>   drivers/lightnvm/gennvm.c | 7 ++-----
>   1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
> index 35dde84..ce60254 100644
> --- a/drivers/lightnvm/gennvm.c
> +++ b/drivers/lightnvm/gennvm.c
> @@ -262,14 +262,11 @@ static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
>   	if (list_empty(&lun->free_list)) {
>   		pr_err_ratelimited("gennvm: lun %u have no free pages available",
>   								lun->vlun.id);
> -		spin_unlock(&vlun->lock);
>   		goto out;
>   	}
>
> -	while (!is_gc && lun->vlun.nr_free_blocks < lun->reserved_blocks) {
> -		spin_unlock(&vlun->lock);
> +	if (!is_gc && lun->vlun.nr_free_blocks < lun->reserved_blocks)
>   		goto out;
> -	}
>
>   	blk = list_first_entry(&lun->free_list, struct nvm_block, list);
>   	list_move_tail(&blk->list, &lun->used_list);
> @@ -278,8 +275,8 @@ static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
>   	lun->vlun.nr_free_blocks--;
>   	lun->vlun.nr_inuse_blocks++;
>
> -	spin_unlock(&vlun->lock);
>   out:
> +	spin_unlock(&vlun->lock);
>   	return blk;
>   }
>
>

Thanks Tao, applied.
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