hwpoison: rename CONFIG

CONFIG_HUGETLBFS controls hugetlbfs interface code.
OTOH, CONFIG_HUGETLB_PAGE controls hugepage management code.
So we should use CONFIG_HUGETLB_PAGE here.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
diff --git a/mm/rmap.c b/mm/rmap.c
index 0ad5357..71bd30a 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1462,7 +1462,7 @@
 }
 #endif /* CONFIG_MIGRATION */
 
-#ifdef CONFIG_HUGETLBFS
+#ifdef CONFIG_HUGETLB_PAGE
 /*
  * The following three functions are for anonymous (private mapped) hugepages.
  * Unlike common anonymous pages, anonymous hugepages have no accounting code
@@ -1503,4 +1503,4 @@
 	atomic_set(&page->_mapcount, 0);
 	__hugepage_set_anon_rmap(page, vma, address, 1);
 }
-#endif /* CONFIG_HUGETLBFS */
+#endif /* CONFIG_HUGETLB_PAGE */