[PATCH 054/118] drbd: Make the peer_seq updating code more obvious

Philipp Reisner
2011-08-25T15:26:29Z

From: Andreas Gruenbacher <agruen@linbit.com>

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>
---
drivers/block/drbd/drbd_receiver.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index cde48f3..654c1c9 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1654,15 +1654,15 @@ static u32 seq_max(u32 a, u32 b)
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);
}

--
1.7.4.1