[PATCH v1] mm: relax deferred struct page requirements

[Heiko Carstens]

On Thu, Nov 16, 2017 at 08:46:01PM -0500, Pavel Tatashin wrote:
> 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 at oracle.com>
> ---
>  arch/powerpc/Kconfig | 1 -
>  arch/s390/Kconfig    | 1 -
>  arch/x86/Kconfig     | 1 -
>  mm/Kconfig           | 7 +------
>  4 files changed, 1 insertion(+), 9 deletions(-)

For s390 the s390 bit:

Acked-by: Heiko Carstens <heiko.carstens at de.ibm.com>