diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 6431f6921a6..3586b3b3df3 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -425,9 +425,6 @@ static ssize_t read_oldmem(struct file *file, char __user *buf,
 }
 #endif
 
-extern long vread(char *buf, char *addr, unsigned long count);
-extern long vwrite(char *buf, char *addr, unsigned long count);
-
 #ifdef CONFIG_DEVKMEM
 /*
  * This function reads the *virtual* memory as seen by the kernel.
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 307b88577ea..506e7620a98 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -97,6 +97,10 @@ extern void unmap_kernel_range(unsigned long addr, unsigned long size);
 extern struct vm_struct *alloc_vm_area(size_t size);
 extern void free_vm_area(struct vm_struct *area);
 
+/* for /dev/kmem */
+extern long vread(char *buf, char *addr, unsigned long count);
+extern long vwrite(char *buf, char *addr, unsigned long count);
+
 /*
  *	Internals.  Dont't use..
  */