Previously it was being implicitly included through some other header file Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
@@ -20,6 +20,7 @@
#include <linux/bio.h>
#include <linux/bitops.h>
#include <linux/blkdev.h>
+#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/genhd.h>