1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 389d1c382e20..e92054d6530b 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -180,6 +180,11 @@ extern int isolate_lru_page(struct page *p);
 extern int putback_lru_pages(struct list_head *l);
 extern int migrate_pages(struct list_head *l, struct list_head *t,
                 struct list_head *moved, struct list_head *failed);
+#else
+static inline int isolate_lru_page(struct page *p) { return -ENOSYS; }
+static inline int putback_lru_pages(struct list_head *l) { return 0; }
+static inline int migrate_pages(struct list_head *l, struct list_head *t,
+        struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
 #endif
 
 #ifdef CONFIG_MMU