diff --git a/include/linux/mm.h b/include/linux/mm.h
index c270fa6..f710d32 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -213,6 +213,10 @@
 					 * is set (which is also implied by
 					 * VM_FAULT_ERROR).
 					 */
+	/* for ->map_pages() only */
+	pgoff_t max_pgoff;		/* map pages for offset from pgoff till
+					 * max_pgoff inclusive */
+	pte_t *pte;			/* pte entry associated with ->pgoff */
 };
 
 /*
@@ -224,6 +228,7 @@
 	void (*open)(struct vm_area_struct * area);
 	void (*close)(struct vm_area_struct * area);
 	int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf);
+	void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf);
 
 	/* notification that a previously read-only page is about to become
 	 * writable, if an error is returned it will cause a SIGBUS */
@@ -584,6 +589,9 @@
 		pte = pte_mkwrite(pte);
 	return pte;
 }
+
+void do_set_pte(struct vm_area_struct *vma, unsigned long address,
+		struct page *page, pte_t *pte, bool write, bool anon);
 #endif
 
 /*