From: YueHaibing <yuehaibing@huawei.com>
To: Christoph Hellwig <hch@infradead.org>
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: Wed, 25 Jul 2018 10:24:07 +0800 [thread overview]
Message-ID: <0414bb3e-33a2-8f30-f765-ee10ecb44fad@huawei.com> (raw)
In-Reply-To: <20180724180906.GA8240@infradead.org>
On 2018/7/25 2:09, Christoph Hellwig wrote:
> 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.
ok, will send v2.
>
> .
>
prev parent reply other threads:[~2018-07-25 2:24 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
2018-07-25 2:24 ` YueHaibing [this message]
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