Commit 25e59881 authored by Christoph Lameter's avatar Christoph Lameter Committed by Ingo Molnar

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: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent b2ef7497
...@@ -178,7 +178,7 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) ...@@ -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)]; page = &pte_page(*pte)[vpfn % (HPAGE_SIZE/PAGE_SIZE)];
WARN_ON(!PageCompound(page)); WARN_ON(!PageHead(page));
return page; return page;
} }
......
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