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Date: Wed, 14 May 1997 14:30:31 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199705140430.OAA28175@godzilla.zeta.org.au>
To: freebsd-current@FreeBSD.ORG, j@ida.interface-business.de
Subject: Re: Big problem with b_blkno
Cc: jmz@cabri.obs-besancon.fr
Sender: owner-current@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>Extract from physio():
>
>                        bp->b_blkno = btodb(uio->uio_offset);
>
>This block number is being passed down to the strategy routine of the
>block device drivers.  No uio_offset itself is being passed down
>whatsoever.  This is nonsense.

Actually, this is for character device drivers that use physio()
(usually via rawread() or rawwrite()).  It doesn't affect drivers that
use copyin/out() or uiomove() directly.

Bruce