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mm: add new arch_make_huge_pte() method for tile support

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The tile support for multiple-size huge pages requires tagging
the hugetlb PTE with a "super" bit for PTEs that are multiples of
the basic size of a pagetable span.  To set that bit properly
we need to tweak the PTe in make_huge_pte() based on the vma.

This change provides the API for a subsequent tile-specific
change to use.

Reviewed-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2012-04-01 14:01:34 -04:00
parent fc0c49f5db
commit d9ed9faac2
2 changed files with 9 additions and 0 deletions
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8
include/linux/hugetlb.h
View File

@ -284,6 +284,14 @@ static inline unsigned int blocks_per_huge_page(struct hstate *h)
#include <asm/hugetlb.h>
#ifndef arch_make_huge_pte
static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
struct page *page, int writable)
{
return entry;
}
#endif
static inline struct hstate *page_hstate(struct page *page)
{
return size_to_hstate(PAGE_SIZE << compound_order(page));

1
mm/hugetlb.c
View File

@ -2213,6 +2213,7 @@ static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page,
}
entry = pte_mkyoung(entry);
entry = pte_mkhuge(entry);
entry = arch_make_huge_pte(entry, vma, page, writable);
return entry;
}