From: " Christoph Hellwig <hch@lst.de>" <hch@lst.de>
To: Hillf Danton <hdanton@sina.com>
Cc: "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
" Christoph Hellwig <hch@lst.de>" <hch@lst.de>,
" Marek Szyprowski <m.szyprowski@samsung.com>"
<m.szyprowski@samsung.com>,
" Will Deacon <will.deacon@arm.com>" <will.deacon@arm.com>,
" Mauro Carvalho Chehab <mchehab@kernel.org>"
<mchehab@kernel.org>
Subject: Re: [patch] media: videobuf-dma-sg: Clear dma coherent buf only once
Date: Wed, 27 Mar 2019 09:25:01 +0100 [thread overview]
Message-ID: <20190327082501.GM20525@lst.de> (raw)
In-Reply-To: <20190321103623.99BD968CEC@newverein.lst.de>
On Thu, Mar 21, 2019 at 06:36:21PM +0800, Hillf Danton wrote:
> On both the arch and dma core sides, see commit 6829e274a623 and 518a2f1925c3
> respectively, efforts are paid for clearing memory returned from dma_alloc_*
> functions, so on the driver side we can get our duty offloaded by explicitly
> asking the dma core for a zero-ed buffer.
And why do you think you then need to pass __GFP_ZERO?
parent reply other threads:[~2019-03-27 8:25 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20190321103623.99BD968CEC@newverein.lst.de>]
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