Re: [PATCH] mm: generalize ZONE_[DMA|DMA32]
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- To: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
- Subject: Re: [PATCH] mm: generalize ZONE_[DMA|DMA32]
- From: Catalin Marinas <catalin.marinas@xxxxxxx>
- Date: Thu, 27 May 2021 18:43:21 +0100
- Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-alpha@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Will Deacon <will@xxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Richard Henderson <rth@xxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>
- In-reply-to: <20210527143047.123611-1-wangkefeng.wang@huawei.com>
- References: <20210527143047.123611-1-wangkefeng.wang@huawei.com>
- User-agent: Mutt/1.10.1 (2018-07-13)
On Thu, May 27, 2021 at 10:30:47PM +0800, Kefeng Wang wrote:
> ZONE_[DMA|DMA32] configs have duplicate definitions on platforms
> that subscribe them. Instead, just make them generic options which
> can be selected on applicable platforms.
>
> Also only x86/arm64 architectures could enable both ZONE_DMA and
> ZONE_DMA32 if EXPERT, add ARCH_HAS_ZONE_DMA_SET to make dma zone
> configurable and visible on the two architectures.
>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
> Cc: Richard Henderson <rth@xxxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxx>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
For arm64:
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
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