From owner-freebsd-hackers Wed Apr 23 00:21:26 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id AAA12962 for hackers-outgoing; Wed, 23 Apr 1997 00:21:26 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.5/8.8.5) with SMTP id AAA12945 for ; Wed, 23 Apr 1997 00:21:20 -0700 (PDT) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id JAA23802 for hackers@freebsd.org; Wed, 23 Apr 1997 09:21:18 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.5/8.8.5) id JAA02090; Wed, 23 Apr 1997 09:01:21 +0200 (MET DST) Message-ID: <19970423090121.MR12299@uriah.heep.sax.de> Date: Wed, 23 Apr 1997 09:01:21 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: hackers@freebsd.org Subject: Re: concurrent calls to device drivers References: <19970422214531.BX39690@uriah.heep.sax.de> <199704230227.LAA18664@genesis.atrad.adelaide.edu.au> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199704230227.LAA18664@genesis.atrad.adelaide.edu.au>; from Michael Smith on Apr 23, 1997 11:57:14 +0930 Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Michael Smith wrote: > > Unless the interrupt service can modify sc_busy, you don't need to > > protect it. > > I was thinking explicitly about the speaker driver when I wrote this; ... Ok, if you wanna make the speaker driver asynch, then you need it. > Do we have sample implementations of these primitives? Last I heard the > SMP kernel wasn't doing kernel reentrancy yet, so I guess it's not vital > yet... Don't ask me about SMP. :) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)