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-rw-r--r--mm/hugetlb.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 5560b50876fb..85f42ec1a927 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5857,6 +5857,21 @@ unlock:
return ret;
}
+int get_hwpoison_huge_page(struct page *page, bool *hugetlb)
+{
+ int ret = 0;
+
+ *hugetlb = false;
+ spin_lock_irq(&hugetlb_lock);
+ if (PageHeadHuge(page)) {
+ *hugetlb = true;
+ if (HPageFreed(page) || HPageMigratable(page))
+ ret = get_page_unless_zero(page);
+ }
+ spin_unlock_irq(&hugetlb_lock);
+ return ret;
+}
+
void putback_active_hugepage(struct page *page)
{
spin_lock_irq(&hugetlb_lock);