From owner-cvs-src-old@FreeBSD.ORG  Thu Aug  5 05:00:25 2010
Return-Path: <owner-cvs-src-old@FreeBSD.ORG>
Delivered-To: cvs-src-old@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 96E8E10656AC
	for <cvs-src-old@freebsd.org>; Thu,  5 Aug 2010 05:00:03 +0000 (UTC)
	(envelope-from neel@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id C3EEA8FC18
	for <cvs-src-old@freebsd.org>; Thu,  5 Aug 2010 05:00:03 +0000 (UTC)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.4/8.14.4) with ESMTP id o75503ad023898
	for <cvs-src-old@freebsd.org>; Thu, 5 Aug 2010 05:00:03 GMT
	(envelope-from neel@repoman.freebsd.org)
Received: (from svn2cvs@localhost)
	by repoman.freebsd.org (8.14.4/8.14.4/Submit) id o755031e023897
	for cvs-src-old@freebsd.org; Thu, 5 Aug 2010 05:00:03 GMT
	(envelope-from neel@repoman.freebsd.org)
Message-Id: <201008050500.o755031e023897@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to
	neel@repoman.freebsd.org using -f
From: Neel Natu <neel@FreeBSD.org>
Date: Thu, 5 Aug 2010 04:59:54 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/mips/mips tick.c src/sys/mips/sibyte
 sb_machdep.c
X-BeenThere: cvs-src-old@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: **OBSOLETE** CVS commit messages for the src tree
	<cvs-src-old.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src-old>
List-Post: <mailto:cvs-src-old@freebsd.org>
List-Help: <mailto:cvs-src-old-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 05 Aug 2010 05:00:25 -0000

neel        2010-08-05 04:59:54 UTC

  FreeBSD src repository

  Modified files:
    sys/mips/mips        tick.c 
    sys/mips/sibyte      sb_machdep.c 
  Log:
  SVN rev 210854 on 2010-08-05 04:59:54Z by neel
  
  Fix a race between clock_intr() and tick_ticker() when updating
  'counter_upper' and 'counter_lower_last'. The race exists because
  interrupts are enabled even though tick_ticker() executes in a
  critical section.
  
  Fix a bug in clock_intr() in how it updates the cached values of
  'counter_upper' and 'counter_lower_last'. They are updated only
  when the COUNT register rolls over. More interestingly it will *never*
  update the cached values if 'counter_lower_last' happens to be zero.
  
  Get rid of superfluous critical section in clock_intr(). There is no
  reason to do this because clock_intr() executes in hard interrupt
  context.
  
  Switch back to using 'tick_ticker()' as the cpu ticker for Sibyte.
  
  Reviewed by:    jmallett, mav
  
  Revision  Changes    Path
  1.17      +29 -17    src/sys/mips/mips/tick.c
  1.13      +0 -2      src/sys/mips/sibyte/sb_machdep.c