From 43131e141abdb44c487cf79af3ef1fe5164dcef9 Mon Sep 17 00:00:00 2001
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Fri, 28 May 2010 09:29:22 +0900
Subject: HWPOISON, hugetlb: support hwpoison injection for hugepage

This patch enables hwpoison injection through debug/hwpoison interfaces,
with which we can test memory error handling for free or reserved
hugepages (which cannot be tested by madvise() injector).

[AK: Export PageHuge too for the injection module]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 mm/hugetlb.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'mm/hugetlb.c')

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 4c2efc0f391..3c275ffd32a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -615,6 +615,8 @@ int PageHuge(struct page *page)
 	return dtor == free_huge_page;
 }
 
+EXPORT_SYMBOL_GPL(PageHuge);
+
 static struct page *alloc_fresh_huge_page_node(struct hstate *h, int nid)
 {
 	struct page *page;
-- 
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