Wrapper for lower-level revalidate_disk routines.

[mirror_ubuntu-zesty-kernel.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index c3fa19bd64df631be36e45f7c253008f54b7597c..4eeb69a887345b042fe2ff1250292a4d937f2557 100644 (file)
--- a/fs/block_dev.c
+++ b/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