[RFC PATCH v2 05/11] mm: thp: Correct the HPAGE_PMD_ORDER check.

[Kirill A. Shutemov]

On Wed, May 08, 2013 at 10:52:37AM +0100, Steve Capper wrote:
> All Transparent Huge Pages are allocated by the buddy allocator.
> 
> A compile time check is in place that fails when the order of a
> transparent huge page is too large to be allocated by the buddy
> allocator. Unfortunately that compile time check passes when:
> HPAGE_PMD_ORDER == MAX_ORDER
> ( which is incorrect as the buddy allocator can only allocate
> memory of order strictly less than MAX_ORDER. )

It looks confusing to me. Shouldn't we fix what MAX_ORDER means instead?

-- 
 Kirill A. Shutemov