1 files changed, 7 insertions, 0 deletions

diff --git a/init/main.c b/init/main.c
index ca380ec685de..ed7e7ad5fee0 100644
--- a/init/main.c
+++ b/init/main.c
@@ -51,6 +51,7 @@
 #include <linux/mempolicy.h>
 #include <linux/key.h>
 #include <linux/buffer_head.h>
+#include <linux/page_ext.h>
 #include <linux/debug_locks.h>
 #include <linux/debugobjects.h>
 #include <linux/lockdep.h>
@@ -484,6 +485,11 @@ void __init __weak thread_info_cache_init(void)
  */
 static void __init mm_init(void)
 {
+        /*
+         * page_ext requires contiguous pages,
+         * bigger than MAX_ORDER unless SPARSEMEM.
+         */
+        page_ext_init_flatmem();
         mem_init();
         kmem_cache_init();
         percpu_init_late();
@@ -621,6 +627,7 @@ asmlinkage __visible void __init start_kernel(void)
                 initrd_start = 0;
         }
 #endif
+        page_ext_init();
         debug_objects_mem_init();
         kmemleak_init();
         setup_per_cpu_pageset();