From 25e59881f109dc6378ebc463ae4c2de907435de3 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Wed, 26 Mar 2008 21:03:04 -0700 Subject: [PATCH] x86: stricter check in follow_huge_addr() The first page of the compound page is determined in follow_huge_addr() but then PageCompound() only checks if the page is part of a compound page. PageHead() allows checking if this is indeed the first page of the compound. Cc: Jeremy Fitzhardinge Signed-off-by: Christoph Lameter Signed-off-by: Ingo Molnar --- arch/x86/mm/hugetlbpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c index 4fbafb4bc2f..0b3d567e686 100644 --- a/arch/x86/mm/hugetlbpage.c +++ b/arch/x86/mm/hugetlbpage.c @@ -178,7 +178,7 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) page = &pte_page(*pte)[vpfn % (HPAGE_SIZE/PAGE_SIZE)]; - WARN_ON(!PageCompound(page)); + WARN_ON(!PageHead(page)); return page; } -- 2.20.1