From: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/pagewalk.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN lib/pagewalk.c~maps2-move-the-page-walker-code-to-lib-fix lib/pagewalk.c
--- a/lib/pagewalk.c~maps2-move-the-page-walker-code-to-lib-fix
+++ a/lib/pagewalk.c
@@ -1,5 +1,6 @@
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/sched.h>
 
 static int walk_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 			  struct mm_walk *walk, void *private)
_