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Commit d9ed9faa authored by Chris Metcalf's avatar Chris Metcalf
Browse files

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: default avatarHillf Danton <dhillf@gmail.com>
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent fc0c49f5

include/linux/hugetlb.h

+8 −0
Original line number Diff line number Diff line
@@ -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));

mm/hugetlb.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

}