linux-kernel - Re: [PATCH 09/39] aoe: drop null test before destroy functions

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Date:	Mon, 14 Sep 2015 21:39:01 -0400
From:	Ed Cashin <ed.cashin@....org>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	sergey.senozhatsky@...il.com, kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/39] aoe: drop null test before destroy functions

ACK.  Thanks.

On 09/13/2015 08:15 AM, Julia Lawall wrote:
> Remove unneeded NULL test.
>
> The semantic patch that makes this change is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@ expression x; @@
> -if (x != NULL)
>    \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>
> ---
>   drivers/block/aoe/aoedev.c |    3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
> index ffd1947..efc8a8a 100644
> --- a/drivers/block/aoe/aoedev.c
> +++ b/drivers/block/aoe/aoedev.c
> @@ -285,8 +285,7 @@ freedev(struct aoedev *d)
>   	e = t + d->ntargets;
>   	for (; t < e && *t; t++)
>   		freetgt(d, *t);
> -	if (d->bufpool)
> -		mempool_destroy(d->bufpool);
> +	mempool_destroy(d->bufpool);
>   	skbpoolfree(d);
>   	minor_free(d->sysminor);
>   
>

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