1 files changed, 8 insertions, 6 deletions

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index bed5f16ba827..43bdab769fc3 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -94,12 +94,6 @@ void ksm_migrate_page(struct page *newpage, struct page *oldpage);
 
 #else  /* !CONFIG_KSM */
 
-static inline int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
-                unsigned long end, int advice, unsigned long *vm_flags)
-{
-        return 0;
-}
-
 static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm)
 {
         return 0;
@@ -114,6 +108,13 @@ static inline int PageKsm(struct page *page)
         return 0;
 }
 
+#ifdef CONFIG_MMU
+static inline int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
+                unsigned long end, int advice, unsigned long *vm_flags)
+{
+        return 0;
+}
+
 static inline struct page *ksm_might_need_to_copy(struct page *page,
                         struct vm_area_struct *vma, unsigned long address)
 {
@@ -140,6 +141,7 @@ static inline int rmap_walk_ksm(struct page *page, int (*rmap_one)(struct page*,
 static inline void ksm_migrate_page(struct page *newpage, struct page *oldpage)
 {
 }
+#endif /* CONFIG_MMU */
 #endif /* !CONFIG_KSM */
 
 #endif /* __LINUX_KSM_H */