Re: [PATCH] mm: generalize ZONE_[DMA|DMA32]

From: Geert Uytterhoeven (geert@xxxxxxxxxxxxxx)
Date: Thu May 27 2021 - 10:27:13 EST

On Thu, May 27, 2021 at 4:21 PM 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 <>

> arch/m68k/Kconfig | 5 +----

Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds