Re: [PATCH V4 02/18] mm: Some arch may want to use HPAGE_PMD related values as variables

On 23/02/16 15:48, Aneesh Kumar K.V wrote:

From: "Kirill A. Shutemov" <redacted>

In the changelog, strip from here <--

With next generation power processor, we are having a new mmu model
[1] that require us to maintain a different linux page table format.

Inorder to support both current and future ppc64 systems with a single
kernel we need to make sure kernel can select between different page
table format at runtime.

---> till here

 With the new MMU (radix MMU) added, we will
have two different pmd hugepage size 16MB for hash model and 2MB for
Radix model. Hence make HPAGE_PMD related values as a variable.

Actual conversion of HPAGE_PMD to a variable for ppc64 happens in a
followup patch.

[1] http://ibm.biz/power-isa3 (Needs registration).

Signed-off-by: Kirill A. Shutemov <redacted>
Signed-off-by: Aneesh Kumar K.V <redacted>

Balbir Singh.