From owner-cvs-all  Tue May 25  3:54: 3 1999
Delivered-To: cvs-all@freebsd.org
Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.26.10.9])
	by hub.freebsd.org (Postfix) with ESMTP
	id B904C153AD; Tue, 25 May 1999 03:53:56 -0700 (PDT)
	(envelope-from bde@godzilla.zeta.org.au)
Received: (from bde@localhost)
	by godzilla.zeta.org.au (8.8.7/8.8.7) id UAA18301;
	Tue, 25 May 1999 20:50:39 +1000
Date: Tue, 25 May 1999 20:50:39 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199905251050.UAA18301@godzilla.zeta.org.au>
To: bde@zeta.org.au, brian@Awfulhak.org
Subject: Re: cvs commit: src/sys/i386/boot/biosboot table.c
Cc: brian@FreeBSD.org, cvs-all@FreeBSD.org,
	cvs-committers@FreeBSD.org
Sender: owner-cvs-all@FreeBSD.ORG
Precedence: bulk

>I've backed out the change.
>
>Would adding a ``case 5: maj = 30;'' in sys.c and tacking "ad" on to 
>the end of the list in table.c be better ?

That would cause bad accesses to devs[30].  devs[] could be enlarged
at a cost of some space.

My version passes the typed-in device name to the kernel and the kernel
ignores the boot blocks' guess of the major if it can make sense of
the name.  I might finish this if anyone still uses the old boot blocks.
It doesn't work right for "ad", because ad_cdevsw lies about the driver
name -- it claims to be "wd" for compatibility, so lookups of "ad" fail.
This also breaks the lookups for -r and -a -- you have to misspecify
"ad" as "wd" and not configure the real "wd" so that there is no conflict.

Bruce


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message