drbd: Make the peer_seq updating code more obvious
Make it more clear that update_peer_seq() is supposed to wake up the
seq_wait queue whenever the sequence number changes.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index b063ca2..bc5351d 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1650,15 +1650,15 @@
return seq_greater(a, b) ? a : b;
}
-static void update_peer_seq(struct drbd_conf *mdev, unsigned int new_seq)
+static void update_peer_seq(struct drbd_conf *mdev, unsigned int peer_seq)
{
- unsigned int m;
+ unsigned int old_peer_seq;
spin_lock(&mdev->peer_seq_lock);
- m = seq_max(mdev->peer_seq, new_seq);
- mdev->peer_seq = m;
+ old_peer_seq = mdev->peer_seq;
+ mdev->peer_seq = seq_max(mdev->peer_seq, peer_seq);
spin_unlock(&mdev->peer_seq_lock);
- if (m == new_seq)
+ if (old_peer_seq != peer_seq)
wake_up(&mdev->seq_wait);
}