From: Christoph Hellwig <hch@lst.de>
To: Barry Song <song.bao.hua@hisilicon.com>
Cc: m.szyprowski@samsung.com, hch@lst.de, robin.murphy@arm.com,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
linuxarm@openeuler.org
Subject: Re: [PATCH v2] dma-mapping: benchmark: pretend DMA is transmitting
Date: Fri, 5 Feb 2021 10:21:13 +0100 [thread overview]
Message-ID: <20210205092113.GA870@lst.de> (raw)
In-Reply-To: <20210205020035.25340-1-song.bao.hua@hisilicon.com>
On Fri, Feb 05, 2021 at 03:00:35PM +1300, Barry Song wrote:
> + __u32 dma_trans_ns; /* time for DMA transmission in ns */
> __u64 expansion[10]; /* For future use */
We need to keep the struct size, so the expansion field needs to
shrink by the equivalent amount of data that is added in dma_trans_ns.
next prev parent reply other threads:[~2021-02-05 9:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 2:00 [PATCH v2] dma-mapping: benchmark: pretend DMA is transmitting Barry Song
2021-02-05 9:21 ` Christoph Hellwig [this message]
2021-02-05 10:32 ` Song Bao Hua (Barry Song)
2021-02-05 10:36 ` Christoph Hellwig
2021-02-05 10:52 ` Song Bao Hua (Barry Song)
2021-02-05 10:56 ` Christoph Hellwig
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