linux-kernel - Re: [PATCH V7 1/2] dma-mapping: Rework dma_get_cache

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Date:   Tue, 26 Sep 2017 08:10:19 +0200
From:   Christoph Hellwig <hch@....de>
To:     陈华才 <chenhc@...ote.com>
Cc:     Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Fuxin Zhang <zhangfx@...ote.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <james.hogan@...tec.com>,
        linux-mips <linux-mips@...ux-mips.org>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi <linux-scsi@...r.kernel.org>,
        Roland Dreier <rolandd@...co.com>,
        Pawel Osciak <pawel@...iak.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Ivan Mikhaylov <ivan@...ibm.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Andy Gross <agross@...eaurora.org>,
        "Mark A . Greer" <mgreer@...sta.com>,
        Robert Baldyga <r.baldyga@...sung.com>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH V7 1/2] dma-mapping: Rework dma_get_cache_alignment()

On Tue, Sep 26, 2017 at 09:48:01AM +0800, 陈华才 wrote:
> Hi, Christoph,
> 
> Can I put the declaration in asm/dma-coherence.h?

Generally something not expose to the rest of the kernel (that is not
in arch/mips/include/) would be preferred, but in the end the architecture
maintainer will have to decide.

> And, last time you said it is OK to pass a NULL to dma_get_cache_alignment() and cc all driver maintainers. I have do so.

No, I asked you to converted everything to pass the struct device and
cc the driver maintainers.