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drbd: Make the peer_seq updating code more obvious

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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>
This commit is contained in:
Andreas Gruenbacher 2011-02-03 18:42:08 +01:00 committed by Philipp Reisner
parent 6024fece73
commit 43ae077d0a
1 changed files with 5 additions and 5 deletions
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10
drivers/block/drbd/drbd_receiver.c
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@ -1650,15 +1650,15 @@ 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);
}