[PATCH v3] drbd: use get_random_u64() where appropriate

[David Carlier <devnexen@gmail.com>]

Use the typed random integer helpers instead of
get_random_bytes() when filling a single integer variable.
The helpers return the value directly, require no pointer
or size argument, and better express intent.

Signed-off-by: David Carlier <devnexen@gmail.com>
---
 drivers/block/drbd/drbd_main.c | 4 ++--
 drivers/block/drbd/drbd_nl.c   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 200d464e984b..b1a721dd0496 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -874,7 +874,7 @@ void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device)
 	if (uuid && uuid != UUID_JUST_CREATED)
 		uuid = uuid + UUID_NEW_BM_OFFSET;
 	else
-		get_random_bytes(&uuid, sizeof(u64));
+		uuid = get_random_u64();
 	drbd_uuid_set(device, UI_BITMAP, uuid);
 	drbd_print_uuids(device, "updated sync UUID");
 	drbd_md_sync(device);
@@ -3337,7 +3337,7 @@ void drbd_uuid_new_current(struct drbd_device *device) __must_hold(local)
 	u64 val;
 	unsigned long long bm_uuid;
 
-	get_random_bytes(&val, sizeof(u64));
+	val = get_random_u64();
 
 	spin_lock_irq(&device->ldev->md.uuid_lock);
 	bm_uuid = device->ldev->md.uuid[UI_BITMAP];
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index e201f0087a0f..377f60b40f28 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -3173,7 +3173,7 @@ int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info)
 			 * matching real data uuid exists).
 			 */
 			u64 val;
-			get_random_bytes(&val, sizeof(u64));
+			val = get_random_u64();
 			drbd_set_ed_uuid(device, val);
 			drbd_warn(device, "Resumed without access to data; please tear down before attempting to re-configure.\n");
 		}
-- 
2.53.0