linux-kernel - Re: [PATCH] iommu: omap-iommu.c: remove unnecessary null pointer check

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Date:	Tue, 22 Jan 2013 12:17:53 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Ohad Ben-Cohen <ohad@...ery.com>
Cc:	Cong Ding <dinggnu@...il.com>, Joerg Roedel <joro@...tes.org>,
	Omar Ramirez Luna <omar.luna@...aro.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iommu: omap-iommu.c: remove unnecessary null pointer
 check

* Ohad Ben-Cohen <ohad@...ery.com> [130118 12:58]:
> On Fri, Jan 18, 2013 at 10:42 PM, Cong Ding <dinggnu@...il.com> wrote:
> > The pointer obj is dereferenced in line 146 and 149 respectively, so it is not
> > necessary to check null again in line 149 and 175. And I have checked that all
> > the callers of these two functions guarantee the parameter obj passed is not
> > null.
> >
> > Signed-off-by: Cong Ding <dinggnu@...il.com>
> 
> Acked-by: Ohad Ben-Cohen <ohad@...ery.com>

Yes looks like that's a pointless check and would already obj being NULL would
fail earlier in those functions:

Acked-by: Tony Lindgren <tony@...mide.com>
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