linux-kernel - Re: [PATCH V3 3/4] dmaselftest: add memcpy selftest support functions

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Message-ID: <5640A429.6090302@codeaurora.org>
Date:	Mon, 9 Nov 2015 07:48:25 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Sinan Kaya <okaya@...eaurora.org>, dmaengine@...r.kernel.org,
	cov@...eaurora.org, jcm@...hat.com
Cc:	agross@...eaurora.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 3/4] dmaselftest: add memcpy selftest support functions

Sinan Kaya wrote:
>>
>> And why kmalloc anyway?  Why not leave it on the stack?
>>
>>      char src[] = "hello world";
>>
>> ?
>
> I need to call dma_map_single on this address to convert it to a DMA
> address. That's why.

And you can't do that with an object that's on the stack?

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