linux-kernel - Re: [PATCH 9/9] csky: use the generic remapping dma alloc implementation

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Date:   Fri, 9 Nov 2018 08:51:58 +0100
From:   Christoph Hellwig <hch@....de>
To:     Guo Ren <ren_guo@...ky.com>
Cc:     Christoph Hellwig <hch@....de>, iommu@...ts.linux-foundation.org,
        Robin Murphy <robin.murphy@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Laura Abbott <labbott@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 9/9] csky: use the generic remapping dma alloc
 implementation

On Tue, Nov 06, 2018 at 03:01:41PM +0800, Guo Ren wrote:
> > +	return dma_atomic_pool_init(GFP_KERNEL, pgprot_noncached(PAGE_KERNEL));
> >  }
> >  postcore_initcall(atomic_pool_init);
> Seems also could remove atomic_pool_init from csky, why not put them in
> common?

The code basically moved to common code, but the architecture needs
to pick the gfp mask (GFP_DMA32 on arm vs GFP_KERNEL on csky for example)
and the pgprot it needs for uncached remappings.

> Reviewed-by: Guo Ren <ren_guo@...ky.com>
> 
> Compile is OK, qemu boot OK. Functions are the same and just move to common.

Thanks for your review!