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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2010-09-08 10:19:36 +0900
committerAndi Kleen <ak@linux.intel.com>2010-10-08 09:32:45 +0200
commit6de2b1aab94355482bd2accdc115666509667458 (patch)
tree630a88dd5afe2c49a428179770140b22bbc9d7da /include/linux/hugetlb.h
parent290408d4a25002f099efeee7b6a5778d431154d6 (diff)
HWPOISON, hugetlb: add free check to dequeue_hwpoison_huge_page()
This check is necessary to avoid race between dequeue and allocation, which can cause a free hugepage to be dequeued twice and get kernel unstable. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'include/linux/hugetlb.h')
-rw-r--r--include/linux/hugetlb.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 9e51f77d44ca..796f30e00806 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -43,7 +43,7 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to,
struct vm_area_struct *vma,
int acctflags);
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
-void __isolate_hwpoisoned_huge_page(struct page *page);
+int dequeue_hwpoisoned_huge_page(struct page *page);
void copy_huge_page(struct page *dst, struct page *src);
extern unsigned long hugepages_treat_as_movable;
@@ -102,7 +102,7 @@ static inline void hugetlb_report_meminfo(struct seq_file *m)
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
#define huge_pte_offset(mm, address) 0
-#define __isolate_hwpoisoned_huge_page(page) 0
+#define dequeue_hwpoisoned_huge_page(page) 0
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}