From: Christoph Hellwig <hch@infradead.org>
To: YueHaibing <yuehaibing@huawei.com>
Cc: linux@armlinux.org.uk, matthias.bgg@gmail.com,
vladimir.murzin@arm.com, linux-kernel@vger.kernel.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, akpm@linux-foundation.org,
iamjoonsoo.kim@lge.com, robin.murphy@arm.com, treding@nvidia.com,
zhongjiang@huawei.com
Subject: Re: [PATCH] ARM: dma-mapping: always clear allocated buffers
Date: Tue, 24 Jul 2018 11:09:06 -0700 [thread overview]
Message-ID: <20180724180906.GA8240@infradead.org> (raw)
In-Reply-To: <20180724140435.17112-1-yuehaibing@huawei.com>
On Tue, Jul 24, 2018 at 10:04:35PM +0800, YueHaibing wrote:
> Sean Wang report dma_zalloc_coherent doesn't work as expect on his
> armv7,the allocated mem is not zeroed.The reason is __alloc_from_pool
> doesn't honor __GFP_ZERO.
Please explain the "why" a little more. All the explanations are in
the referenced arm64 commit and should be mentioned here as well.
next prev parent reply other threads:[~2018-07-24 18:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 14:04 YueHaibing
2018-07-24 18:09 ` Christoph Hellwig [this message]
2018-07-25 2:24 ` YueHaibing
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