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SubjectRe: [PATCH v1] mm: relax deferred struct page requirements
Date
Pavel Tatashin <pasha.tatashin@oracle.com> writes:

> There is no need to have ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT,
> as all the page initialization code is in common code.
>
> Also, there is no need to depend on MEMORY_HOTPLUG, as initialization code
> does not really use hotplug memory functionality. So, we can remove this
> requirement as well.
>
> This patch allows to use deferred struct page initialization on all
> platforms with memblock allocator.
>
> Tested on x86, arm64, and sparc. Also, verified that code compiles on
> PPC with CONFIG_MEMORY_HOTPLUG disabled.
>
> Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
> ---
> arch/powerpc/Kconfig | 1 -
> arch/s390/Kconfig | 1 -
> arch/x86/Kconfig | 1 -
> mm/Kconfig | 7 +------
> 4 files changed, 1 insertion(+), 9 deletions(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index cb782ac1c35d..1540348691c9 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -148,7 +148,6 @@ config PPC
> select ARCH_MIGHT_HAVE_PC_PARPORT
> select ARCH_MIGHT_HAVE_PC_SERIO
> select ARCH_SUPPORTS_ATOMIC_RMW
> - select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT

Acked-by: Michael Ellerman <mpe@ellerman.id.au>

cheers

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