linux-kernel - Re: [PATCH 1/3] hexagon: remove the sync_single_for

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Message-ID: <20180725032948.GG12771@codeaurora.org>
Date:   Tue, 24 Jul 2018 22:29:48 -0500
From:   Richard Kuo <rkuo@...eaurora.org>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-hexagon@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] hexagon: remove the sync_single_for_cpu DMA operation

On Thu, Jul 19, 2018 at 05:56:33AM -0700, Christoph Hellwig wrote:
> hexagon does all the required cache maintainance at dma map time, and none
> at unmap time.  It thus has to implement sync_single_for_device to match
> the map cace for buffer reuse, but there is no point in doing another
> invalidation in the sync_single_cpu_case, which in terms of cache
> maintainance is equivalent to the unmap case.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  arch/hexagon/kernel/dma.c | 8 --------
>  1 file changed, 8 deletions(-)
> 

Patch series looks good.  Definitely appreciate the cleanup.

I can take it through my tree, or if not:

Acked-by: Richard Kuo <rkuo@...eaurora.org>

Thanks!

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