linux-kernel - Re: [PATCH] media: add GFP flag to media_*() that could get called in atomic context

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Message-ID: <20160314072236.GO11084@valkosipuli.retiisi.org.uk>
Date:	Mon, 14 Mar 2016 09:22:37 +0200
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Shuah Khan <shuahkh@....samsung.com>
Cc:	mchehab@....samsung.com, kyungmin.park@...sung.com,
	a.hajda@...sung.com, s.nawrocki@...sung.com, kgene@...nel.org,
	k.kozlowski@...sung.com, laurent.pinchart@...asonboard.com,
	hyun.kwon@...inx.com, soren.brinkmann@...inx.com,
	gregkh@...uxfoundation.org, perex@...ex.cz, tiwai@...e.com,
	hans.verkuil@...co.com, lixiubo@...s.chinamobile.com,
	javier@....samsung.com, g.liakhovetski@....de,
	chehabrafael@...il.com, crope@....fi, tommi.franttila@...el.com,
	dan.carpenter@...cle.com, prabhakar.csengg@...il.com,
	hamohammed.sa@...il.com, der.herr@...r.at, navyasri.tech@...il.com,
	Julia.Lawall@...6.fr, amitoj1606@...il.com,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org, devel@...verdev.osuosl.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH] media: add GFP flag to media_*() that could get called
 in atomic context

Hi Shuah,

On Sat, Mar 12, 2016 at 06:48:09PM -0700, Shuah Khan wrote:
> Add GFP flags to media_create_pad_link(), media_create_intf_link(),
> media_devnode_create(), and media_add_link() that could get called
> in atomic context to allow callers to pass in the right flags for
> memory allocation.
> 
> tree-wide driver changes for media_*() GFP flags change:
> Change drivers to add gfpflags to interffaces, media_create_pad_link(),
> media_create_intf_link() and media_devnode_create().
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> Suggested-by: Mauro Carvalho Chehab <mchehab@....samsung.com>

What's the use case for calling the above functions in an atomic context?

-- 
Regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk