From d9ed9faac283a3be73f0e11a2ef49ee55aece4db Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Sun, 1 Apr 2012 14:01:34 -0400 Subject: [PATCH] mm: add new arch_make_huge_pte() method for tile support 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 Signed-off-by: Chris Metcalf --- include/linux/hugetlb.h | 8 ++++++++ mm/hugetlb.c | 1 + 2 files changed, 9 insertions(+) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 000837e126e..d5d6bbe2259 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -284,6 +284,14 @@ static inline unsigned int blocks_per_huge_page(struct hstate *h) #include +#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)); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index ae8f708e3d7..4e28416c47f 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -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; }