Commit 25e59881 authored Mar 26, 2008 by Christoph Lameter Committed by Ingo Molnar Mar 27, 2008

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 <jeremy@goop.org>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent b2ef7497

arch/x86/mm/hugetlbpage.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}