Commit 02b0ccef authored Sep 03, 2005 by Adam Litke Committed by Linus Torvalds Sep 05, 2005

[PATCH] hugetlb: check p?d_present in huge_pte_offset()



For demand faulting, we cannot assume that the page tables will be
populated.  Do what the rest of the architectures do and test p?d_present()
while walking down the page table.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: <linux-mm@kvack.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 7bf07f3d

arch/i386/mm/hugetlbpage.c

+5 −2

Original line number	Original line	Diff line number	Diff line
	@@ -46,8 +46,11 @@ pte_t huge_pte_offset(struct mm_struct mm, unsigned long addr)
	pmd_t *pmd = NULL;		pmd_t *pmd = NULL;

	pgd = pgd_offset(mm, addr);		pgd = pgd_offset(mm, addr);
			if (pgd_present(*pgd)) {
	pud = pud_offset(pgd, addr);		pud = pud_offset(pgd, addr);
			if (pud_present(*pud))
	pmd = pmd_offset(pud, addr);		pmd = pmd_offset(pud, addr);
			}
	return (pte_t *) pmd;		return (pte_t *) pmd;
	}		}