diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index a4b142a6a2c..8d23b0b3871 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/sched.h>
 #include <linux/fs.h>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 492ac946391..a0a99814044 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_BLKDEV_H
 #define _LINUX_BLKDEV_H
 
+#ifdef CONFIG_BLOCK
+
 #include <linux/sched.h>
 #include <linux/major.h>
 #include <linux/genhd.h>
@@ -32,8 +34,6 @@
 )
 #endif
 
-#ifdef CONFIG_BLOCK
-
 struct scsi_ioctl_command;
 
 struct request_queue;
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index b4af6bcb7b7..c7c3337c3a8 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -5,6 +5,7 @@
 #define WRITEBACK_H
 
 #include <linux/sched.h>
+#include <linux/fs.h>
 
 struct backing_dev_info;
 
diff --git a/kernel/sched.c b/kernel/sched.c
index 6107a0cd632..6c10fa796ca 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -61,6 +61,7 @@
 #include <linux/delayacct.h>
 #include <linux/reciprocal_div.h>
 #include <linux/unistd.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlb.h>
 
diff --git a/mm/readahead.c b/mm/readahead.c
index 39bf45d4332..be20c9d699d 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -15,6 +15,7 @@
 #include <linux/backing-dev.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/pagevec.h>
+#include <linux/pagemap.h>
 
 void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
 {