[PATCH 03/11] mm: hugetlb: Copy general hugetlb code from x86 to mm.

[Catalin Marinas]

On Thu, May 23, 2013 at 06:07:50PM +0100, Steve Capper wrote:
> The huge_pte_alloc, huge_pte_offset and follow_huge_p[mu]d
> functions in x86/mm/hugetlbpage.c do not rely on any architecture
> specific knowledge other than the fact that pmds and puds can be
> treated as huge ptes.
> 
> To allow other architectures to use this code (and reduce the need
> for code duplication), this patch copies these functions into mm,
> replaces the use of pud_large with pud_huge and provides a config
> flag to activate them:
> CONFIG_ARCH_WANT_GENERAL_HUGETLB
> 
> If CONFIG_ARCH_WANT_HUGE_PMD_SHARE is also active then the
> huge_pmd_share code will be called by huge_pte_alloc (othewise we
> call pmd_alloc and skip the sharing code).
> 
> Signed-off-by: Steve Capper <steve.capper at linaro.org>

Acked-by: Catalin Marinas <catalin.marinas at arm.com>