diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 1440935..affeaef 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2050,7 +2050,7 @@
 	 * maybe...
 	 */
 	{
-		int stripe = conf->raid_disks * mddev->chunk_size / PAGE_SIZE;
+		int stripe = conf->raid_disks * (mddev->chunk_size / PAGE_SIZE);
 		stripe /= conf->near_copies;
 		if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
 			mddev->queue->backing_dev_info.ra_pages = 2* stripe;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 3184360..122e64e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2382,8 +2382,8 @@
 	 * 2 * (n-1) * chunksize where 'n' is the number of raid devices
 	 */
 	{
-		int stripe = (mddev->raid_disks-1) * mddev->chunk_size
-			/ PAGE_SIZE;
+		int stripe = (mddev->raid_disks-1) *
+			(mddev->chunk_size / PAGE_SIZE);
 		if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
 			mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
 	}
diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index bc69355..e53d2d9 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -2135,8 +2135,8 @@
 	 * 2 * (n-2) * chunksize where 'n' is the number of raid devices
 	 */
 	{
-		int stripe = (mddev->raid_disks-2) * mddev->chunk_size
-			/ PAGE_SIZE;
+		int stripe = (mddev->raid_disks-2) *
+			(mddev->chunk_size / PAGE_SIZE);
 		if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
 			mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
 	}