diff --git a/[refs] b/[refs]
index 8c0793344df4..713be4542515 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0e7af8d04ecb4f6ba8cd1f731f036a004ad0e174
+refs/heads/master: b8a3ad5b53918787f4708ad9dfe90d2557cc78dd
diff --git a/trunk/drivers/char/mem.c b/trunk/drivers/char/mem.c
index a89cb52228c2..55473371b7c6 100644
--- a/trunk/drivers/char/mem.c
+++ b/trunk/drivers/char/mem.c
@@ -26,6 +26,7 @@
 #include <linux/backing-dev.h>
 #include <linux/bootmem.h>
 #include <linux/pipe_fs_i.h>
+#include <linux/pfn.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>