Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1756509AbaGVScN (ORCPT <rfc822;w@1wt.eu>);
	Tue, 22 Jul 2014 14:32:13 -0400
Received: from mail-qg0-f49.google.com ([209.85.192.49]:42463 "EHLO
	mail-qg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1755962AbaGVScL (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Tue, 22 Jul 2014 14:32:11 -0400
MIME-Version: 1.0
In-Reply-To: <20140722181130.GA3278@himangi-Dell>
References: <20140722181130.GA3278@himangi-Dell>
Date: Tue, 22 Jul 2014 22:32:10 +0400
Message-ID: <CALFYKtDo0ivvYWhjAKJs-LiBRQfrxeN8QAQ1QPX4aswb0+VkWw@mail.gmail.com>
Subject: Re: [PATCH] rbd: Use kmem_cache_free
From: Ilya Dryomov <ilya.dryomov@inktank.com>
To: Himangi Saraogi <himangi774@gmail.com>
Cc: Alex Elder <elder@kernel.org>,
        Ceph Development <ceph-devel@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Julia Lawall <julia.lawall@lip6.fr>
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, Jul 22, 2014 at 10:11 PM, Himangi Saraogi <himangi774@gmail.com> wrote:
> Free memory allocated using kmem_cache_zalloc using kmem_cache_free
> rather than kfree.
>
> The Coccinelle semantic patch that makes this change is as follows:
>
> // <smpl>
> @@
> expression x,E,c;
> @@
>
>  x = \(kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\)(c,...)
>  ... when != x = E
>      when != &x
> ?-kfree(x)
> +kmem_cache_free(c,x)
> // </smpl>
>
> Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
> Acked-by: Julia Lawall <julia.lawall@lip6.fr>
> ---
>  drivers/block/rbd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
> index b2c98c1..8381c54 100644
> --- a/drivers/block/rbd.c
> +++ b/drivers/block/rbd.c
> @@ -1158,7 +1158,7 @@ static const char *rbd_segment_name(struct rbd_device *rbd_dev, u64 offset)
>         if (ret < 0 || ret > CEPH_MAX_OID_NAME_LEN) {
>                 pr_err("error formatting segment name for #%llu (%d)\n",
>                         segment, ret);
> -               kfree(name);
> +               kmem_cache_free(rbd_segment_name_cache, name);
>                 name = NULL;
>         }

We seem to have a helper for this, rbd_segment_name_free().  Care to
resend?

Thanks,

                Ilya
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/