Include proper header file for PFN_DOWN()
The recent commit (99a10a60ba9bedcf5d70ef81414d3e03816afa3f) to fix up
mmap_kmem() broke compiles because it used PFN_DOWN() without including
<linux/pfn.h>.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index a89cb52..55473371b 100644
--- a/drivers/char/mem.c
+++ b/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>
