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Message-ID: <Pine.LNX.4.64.0803262101060.2683@schroedinger.engr.sgi.com> Date: Wed, 26 Mar 2008 21:03:04 -0700 (PDT) From: Christoph Lameter <clameter@....com> To: Ingo Molnar <mingo@...e.hu> cc: linux-kernel@...r.kernel.org, Jeremy Fitzhardinge <jeremy@...p.org> Subject: [x86] Stricter check in follow_huge_addr() From: Christoph Lameter <clameter@....com> Subject: Compound Pages: 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@...p.org> Cc: Thomas Gleixner <tglx@...utronix.de> Signed-off-by: Christoph Lameter <clameter@....com> --- arch/x86/mm/hugetlbpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6.25-rc5-mm1/arch/x86/mm/hugetlbpage.c =================================================================== --- linux-2.6.25-rc5-mm1.orig/arch/x86/mm/hugetlbpage.c 2008-03-26 20:43:56.796667401 -0700 +++ linux-2.6.25-rc5-mm1/arch/x86/mm/hugetlbpage.c 2008-03-26 20:44:55.526669888 -0700 @@ -178,7 +178,7 @@ follow_huge_addr(struct mm_struct *mm, u page = &pte_page(*pte)[vpfn % (HPAGE_SIZE/PAGE_SIZE)]; - WARN_ON(!PageCompound(page)); + WARN_ON(!PageHead(page)); return page; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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