linux-kernel - Re: [PATCH 1/1] net: sched: Deletion of an unnecessary check before the function call "kfree"

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Message-ID: <546CCC9E.7090905@redhat.com>
Date:	Wed, 19 Nov 2014 18:00:14 +0100
From:	Daniel Borkmann <dborkman@...hat.com>
To:	John Fastabend <john.fastabend@...il.com>
CC:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	"David S. Miller" <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>, netdev@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, Coccinelle <cocci@...teme.lip6.fr>
Subject: Re: [PATCH 1/1] net: sched: Deletion of an unnecessary check before
 the function call "kfree"

On 11/19/2014 05:47 PM, John Fastabend wrote:
> On 11/18/2014 12:26 PM, SF Markus Elfring wrote:
>> From: Markus Elfring <elfring@...rs.sourceforge.net>
...
>>       if (fp_old)
>>           bpf_prog_destroy(fp_old);
>> -    if (bpf_old)
>> -        kfree(bpf_old);
>> +    kfree(bpf_old);
>>
>>       return 0;
>>
>
> Maybe I need some coffee but I can't figure out what this
> patch is against...
>
> # grep bpf_old ./net/sched/cls_bpf.c
> #

Coffee is always good. :)

Yeah, you actually removed this in commit 1f947bf151e90ec ("net:
sched: rcu'ify cls_bpf"), so looks like Markus's tree is not
up to date ...
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