Re: [PATCH v2] mm: generalize ZONE_[DMA|DMA32]

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Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> writes:
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>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> # for arm64
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> # for m68k
Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
v2:
-i386 can't enable ZONE_DMA32, fix it.
-make ZONE_DMA default y on X86 as before.
-collect ACKs

 arch/alpha/Kconfig                     |  5 +----
 arch/arm/Kconfig                       |  3 ---
 arch/arm64/Kconfig                     |  9 +--------
 arch/ia64/Kconfig                      |  4 +---
 arch/m68k/Kconfig                      |  5 +----
 arch/microblaze/Kconfig                |  4 +---
 arch/mips/Kconfig                      |  7 -------
 arch/powerpc/Kconfig                   |  4 ----
 arch/powerpc/platforms/Kconfig.cputype |  1 +

Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)

cheers



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