1 files changed, 5 insertions, 4 deletions
diff --git a/mm/hugetlb_vmemmap.h b/mm/hugetlb_vmemmap.h
index 25bd0e002431..4573899855d7 100644
--- a/mm/hugetlb_vmemmap.h
+++ b/mm/hugetlb_vmemmap.h
@@ -10,15 +10,16 @@
 #define _LINUX_HUGETLB_VMEMMAP_H
 #include <linux/hugetlb.h>
 
-#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
-int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head);
-void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head);
-
 /*
  * Reserve one vmemmap page, all vmemmap addresses are mapped to it. See
  * Documentation/vm/vmemmap_dedup.rst.
  */
 #define HUGETLB_VMEMMAP_RESERVE_SIZE	PAGE_SIZE
+#define HUGETLB_VMEMMAP_RESERVE_PAGES	(HUGETLB_VMEMMAP_RESERVE_SIZE / sizeof(struct page))
+
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
+int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head);
+void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head);
 
 static inline unsigned int hugetlb_vmemmap_size(const struct hstate *h)
 {