Re: [PATCH v2 1/2] mm: Introduce common STRUCT_PAGE_MAX_SHIFT define

[Catalin Marinas]

On Wed, Nov 07, 2018 at 01:54:32PM -0700, Logan Gunthorpe wrote:
> This define is used by arm64 to calculate the size of the vmemmap
> region. It is defined as the log2 of the upper bound on the size
> of a struct page.
> 
> We move it into mm_types.h so it can be defined properly instead of
> set and checked with a build bug. This also allows us to use the same
> define for riscv.
> 
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Acked-by: Will Deacon <will.deacon@xxxxxxx>
> Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>