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Date:   Fri, 8 May 2020 09:16:09 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Marek Szyprowski <m.szyprowski@samsung.com>
Cc:     Christoph Hellwig <hch@lst.de>, dri-devel@lists.freedesktop.org,
        iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org,
        linux-kernel@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        linux-arm-kernel@lists.infradead.org,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>
Subject: Re: [PATCH v3 02/25] drm: core: fix common struct sg_table related
 issues
Message-ID: <20200508071609.GA31690@lst.de>
References: <20200505083926.28503-1-m.szyprowski@samsung.com> <20200505084614.30424-1-m.szyprowski@samsung.com> <CGME20200505084625eucas1p1a3c25fd171f360e0aab2f76700699454@eucas1p1.samsung.com> <20200505084614.30424-2-m.szyprowski@samsung.com> <20200505101508.GA14860@lst.de> <5dd1cb55-accb-0dc6-4ca5-90c57cd19527@samsung.com> <20200505110950.GA19067@lst.de> <b887c355-14db-ad37-0e93-733ff2249967@samsung.com>
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On Fri, May 08, 2020 at 09:12:13AM +0200, Marek Szyprowski wrote:
> Then we would just need one more helper to construct scatterlist, as the 
> above two are read-only don't allow to modify scatterlist:
> 
> #define for_each_sgtable_sg(sgt, sg, i)??????????????? \
>  ?????? for_each_sg(sgt->sgl, sg, sgt->orig_nents, i)
> 
> With the above 3 helpers we can probably get rid of all instances of 
> sg_table->{nents,orig_nents} from the DRM code. I will prepare patches soon.

Sounds great, thanks!