Re: [PATCH] asm-generic: provide generic page_to_phys and phys_to_page implementations

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Le 09/10/2024 à 13:43, Christoph Hellwig a écrit :
page_to_phys is duplicated by all architectures, and from some strange
reason placed in <asm/io.h> where it doesn't fit at all.

phys_to_page is only provided by a few architectures despite having a lot
of open coded users.

Provide generic versions in <asm-generic/memory_model.h> to make these
helpers more easily usable.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
  arch/alpha/include/asm/io.h         |  1 -
  arch/arc/include/asm/io.h           |  3 ---
  arch/arm/include/asm/memory.h       |  6 ------
  arch/arm64/include/asm/memory.h     |  6 ------
  arch/csky/include/asm/page.h        |  3 ---
  arch/hexagon/include/asm/page.h     |  6 ------
  arch/loongarch/include/asm/page.h   |  3 ---
  arch/m68k/include/asm/virtconvert.h |  3 ---
  arch/microblaze/include/asm/page.h  |  1 -
  arch/mips/include/asm/io.h          |  5 -----
  arch/nios2/include/asm/io.h         |  3 ---
  arch/openrisc/include/asm/page.h    |  2 --
  arch/parisc/include/asm/page.h      |  1 -
  arch/powerpc/include/asm/io.h       | 12 ------------

As far as I understand, this patch silently drops part of commit 6bf752daca07 ("powerpc: implement CONFIG_DEBUG_VIRTUAL").

Can you please clarify ?

Christophe




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