diff --git a/[refs] b/[refs]
index 225259a21646..736e44a71258 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 243294dae09c909c0442c8f04d470b69c3c19d6e
+refs/heads/master: 0c002c2f74e10baa9021d3ecc50585c6eafea568
diff --git a/trunk/fs/block_dev.c b/trunk/fs/block_dev.c
index c3fa19bd64df..4eeb69a88734 100644
--- a/trunk/fs/block_dev.c
+++ b/trunk/fs/block_dev.c
@@ -852,6 +852,27 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode)
 
 EXPORT_SYMBOL(open_by_devnum);
 
+/**
+ * revalidate_disk - wrapper for lower-level driver's revalidate_disk
+ *                   call-back
+ *
+ * @disk: struct gendisk to be revalidated
+ *
+ * This routine is a wrapper for lower-level driver's revalidate_disk
+ * call-backs.  It is used to do common pre and post operations needed
+ * for all revalidate_disk operations.
+ */
+int revalidate_disk(struct gendisk *disk)
+{
+	int ret = 0;
+
+	if (disk->fops->revalidate_disk)
+		ret = disk->fops->revalidate_disk(disk);
+
+	return ret;
+}
+EXPORT_SYMBOL(revalidate_disk);
+
 /*
  * This routine checks whether a removable media has been changed,
  * and invalidates all buffer-cache-entries in that case. This
diff --git a/trunk/include/linux/fs.h b/trunk/include/linux/fs.h
index 02a9fb5a830c..d63461f97983 100644
--- a/trunk/include/linux/fs.h
+++ b/trunk/include/linux/fs.h
@@ -1722,6 +1722,7 @@ extern int fs_may_remount_ro(struct super_block *);
  */
 #define bio_data_dir(bio)	((bio)->bi_rw & 1)
 
+extern int revalidate_disk(struct gendisk *);
 extern int check_disk_change(struct block_device *);
 extern int __invalidate_device(struct block_device *);
 extern int invalidate_partition(struct gendisk *, int);