- Implement selwakeuppri() which allows raising the priority of a

  thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c
index b46cef6..e983a5b 100644
--- a/sys/net/if_tun.c
+++ b/sys/net/if_tun.c
@@ -213,7 +213,7 @@ tunstart(struct ifnet *ifp)
 	}
 	if (tp->tun_flags & TUN_ASYNC && tp->tun_sigio)
 		pgsigio(&tp->tun_sigio, SIGIO, 0);
-	selwakeup(&tp->tun_rsel);
+	selwakeuppri(&tp->tun_rsel, PZERO + 1);
 }
 
 static void
@@ -324,7 +324,7 @@ tunclose(dev_t dev, int foo, int bar, struct thread *td)
 	}
 
 	funsetown(&tp->tun_sigio);
-	selwakeup(&tp->tun_rsel);
+	selwakeuppri(&tp->tun_rsel, PZERO + 1);
 
 	TUNDEBUG (ifp, "closed\n");
 	err = rman_release_resource(tp->tun_unit);