From: Andrea Arcangeli <aarcange@redhat.com>
Date: Fri, 8 Jan 2010 22:43:05 +0000 (-0800)
Subject: mm: hugetlb: fix clear_huge_page()
X-Git-Tag: firefly_0821_release~10186^2~1532
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fa3a83f3c8ce68e3a597a6b19bf000fe67fcee93;p=firefly-linux-kernel-4.4.55.git

mm: hugetlb: fix clear_huge_page()

commit 74dbdd239bb1348ad86d28b18574d9c1f28b62ca upstream.

sz is in bytes, MAX_ORDER_NR_PAGES is in pages.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: David Gibson <dwg@au1.ibm.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: David Rientjes <rientjes@google.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index b7b02cec778c..f5a106eeb2bd 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -401,7 +401,7 @@ static void clear_huge_page(struct page *page,
 {
 	int i;
 
-	if (unlikely(sz > MAX_ORDER_NR_PAGES)) {
+	if (unlikely(sz/PAGE_SIZE > MAX_ORDER_NR_PAGES)) {
 		clear_gigantic_page(page, addr, sz);
 		return;
 	}