Forgot to commit this one that should have been done with zs.c rev 1.119:

> Establish interrupt handlers with proper softc per each zs device
> rather than sharing them among all zs devices and searching softc
> in handlers.
>
> The latter method is derived from ancient sun3 zs driver which tried
> to reduce overhead on autovectored interrupts, but nowadays such hack
> might cause recursive global locks on modern SMP capable framework.
>
> Fixes "5.99.30 sparc panic during startup" reported by Hauke Fath
> on tech-kern@:
> http://mail-index.NetBSD.org/tech-kern/2010/06/19/msg008374.html
> and also tested by Jochen Kunz on SS20 with both serial and kbd console.
>
> Ok'ed by mrg@ and dyoung@.

Noticed by martin@.

sys/arch/sparc/include/z8530var.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: z8530var.h,v 1.9 2008/03/29 19:15:35 tsutsui Exp $	*/
+/*	$NetBSD: z8530var.h,v 1.10 2010/06/26 16:10:00 tsutsui Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -54,6 +54,7 @@ struct zsc_softc {
 	int			zsc_node;	/* PROM node, if any */
 	struct evcnt		zsc_intrcnt;	/* count interrupts */
 	struct zs_chanstate	zsc_cs_store[2];
+	void			*zsc_sicookie;	/* softint(9) cookie */
 };
 
 /*