linux-kernel - Re: [PATCHv3 1/3] [media] disable OMAP1 COMPILE

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Date:	Wed, 10 Sep 2014 10:19:41 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Mauro Carvalho Chehab <m.chehab@...sung.com>
Cc:	Linux Media Mailing List <linux-media@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCHv3 1/3] [media] disable OMAP1 COMPILE_TEST

On Wednesday, September 10, 2014 10:04:12 AM Bartlomiej Zolnierkiewicz wrote:
> 
> Hi,
> 
> On Tuesday, September 09, 2014 03:54:04 PM Mauro Carvalho Chehab wrote:
> > This driver depends on a legacy OMAP DMA API. So, it won't
> > compile-test on other archs.
> > 
> > While we might add stubs to the functions, this is not a
> > good idea, as the hole API should be replaced.
> 
> This is also not a good idea becaouse it would break the driver
> for OMAP1 once somebody enables COMPILE_TEST option while also
> having ARCH_OMAP1 enabled (which is perfectly fine and shouldn't
> cause the driver breakage).  In general COMPILE_TEST option is
> completely independent from the arch specific ones and it should
> not change behaviour of the existing code.

Small clarification:

I was of course referring to the original patch for the issue:

  https://lkml.org/lkml/2014/9/9/498

stubs can be added properly with using 

  #if defined(CONFIG_COMPILE_TEST) && !defined(CONFIG_ARCH_OMAP1)

similarly like it is handled for ARCH_QCOM in

  drivers/gpu/drm/msm/msm_drv.h

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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