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

Christophe Leroy
2024-10-09T14:38:03Z

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@lst.de>
> ---
> 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