diff -Nupr src.orig/mm/mmap.c src/mm/mmap.c
--- src.orig/mm/mmap.c	2016-12-15 19:55:38.992000000 +0000
+++ src/mm/mmap.c	2016-12-15 19:56:43.684000000 +0000
@@ -1538,6 +1538,7 @@ static inline int accountable_mapping(st
 	return (vm_flags & (VM_NORESERVE | VM_SHARED | VM_WRITE)) == VM_WRITE;
 }
 
+#include "kpatch-macros.h"
 unsigned long mmap_region(struct file *file, unsigned long addr,
 		unsigned long len, vm_flags_t vm_flags, unsigned long pgoff)
 {
@@ -1547,6 +1548,9 @@ unsigned long mmap_region(struct file *f
 	struct rb_node **rb_link, *rb_parent;
 	unsigned long charged = 0;
 
+	if (!jiffies)
+		printk("kpatch mmap foo\n");
+
 	/* Check against address space limit. */
 	if (!may_expand_vm(mm, len >> PAGE_SHIFT)) {
 		unsigned long nr_pages;