linux-kernel - Re: [PATCH 14/39] SUNRPC: drop null test before destroy functions

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Message-ID: <20150914160710.GB5338@fieldses.org>
Date:	Mon, 14 Sep 2015 12:07:10 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	sergey.senozhatsky@...il.com, kernel-janitors@...r.kernel.org,
	Jeff Layton <jlayton@...chiereds.net>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	Anna Schumaker <anna.schumaker@...app.com>,
	"David S. Miller" <davem@...emloft.net>, linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/39] SUNRPC: drop null test before destroy functions

ACK, but assuming Trond takes this one.--b.

On Sun, Sep 13, 2015 at 02:15:07PM +0200, 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>
> 
> ---
>  net/sunrpc/sched.c |   12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
> index b140c09..425ca2f 100644
> --- a/net/sunrpc/sched.c
> +++ b/net/sunrpc/sched.c
> @@ -1092,14 +1092,10 @@ void
>  rpc_destroy_mempool(void)
>  {
>  	rpciod_stop();
> -	if (rpc_buffer_mempool)
> -		mempool_destroy(rpc_buffer_mempool);
> -	if (rpc_task_mempool)
> -		mempool_destroy(rpc_task_mempool);
> -	if (rpc_task_slabp)
> -		kmem_cache_destroy(rpc_task_slabp);
> -	if (rpc_buffer_slabp)
> -		kmem_cache_destroy(rpc_buffer_slabp);
> +	mempool_destroy(rpc_buffer_mempool);
> +	mempool_destroy(rpc_task_mempool);
> +	kmem_cache_destroy(rpc_task_slabp);
> +	kmem_cache_destroy(rpc_buffer_slabp);
>  	rpc_destroy_wait_queue(&delay_queue);
>  }
>  
--
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