Redo the sigio locking.

Turn the sigio sx into a mutex.

Sigio lock is really only needed to protect interrupts from dereferencing
the sigio pointer in an object when the sigio itself is being destroyed.

In order to do this in the most unintrusive manner change pgsigio's
sigio * argument into a **, that way we can lock internally to the
function.

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c
index b6c76680a010..a6c89fb01fb8 100644
--- a/sys/net/if_tun.c
+++ b/sys/net/if_tun.c
@@ -223,7 +223,7 @@ tunstart(struct ifnet *ifp)
 		wakeup((caddr_t)tp);
 	}
 	if (tp->tun_flags & TUN_ASYNC && tp->tun_sigio)
-		pgsigio(tp->tun_sigio, SIGIO, 0);
+		pgsigio(&tp->tun_sigio, SIGIO, 0);
 	selwakeup(&tp->tun_rsel);
 }