Ok, I apologize profusely to all those folks who all of the sudden 
noticed that their hpib disks were no longer recognized by the kernel.  
An uninvited bug slipped into rdmatch().  I just committed the fix, but 
for all those who can't wait, the patch is appended below.

Hey, nobody's perfect :-)

--------------------------------------------------------------------------
Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffett Field, CA 94035                                Pager: 415.428.6939

Index: rd.c
===================================================================
RCS file: /a/cvsroot/src/sys/arch/hp300/dev/rd.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -c -r1.18 -r1.19
*** rd.c	1996/01/10 20:54:29	1.18
--- rd.c	1996/02/03 03:00:29	1.19
***************
*** 1,4 ****
! /*	$NetBSD: rd.c,v 1.18 1996/01/10 20:54:29 thorpej Exp $	*/
  
  /*
   * Copyright (c) 1988 University of Utah.
--- 1,4 ----
! /*	$NetBSD: rd.c,v 1.19 1996/02/03 03:00:29 thorpej Exp $	*/
  
  /*
   * Copyright (c) 1988 University of Utah.
***************
*** 252,259 ****
  	bzero(&rs->sc_dkdev, sizeof(rs->sc_dkdev));
  	rs->sc_dkdev.dk_name = rs->sc_xname;
  	disk_attach(&rs->sc_dkdev);
- 
- 		return (0);
  
  	return (1);
  }
--- 252,257 ----