From owner-svn-src-head@FreeBSD.ORG Thu Jul 29 19:26:57 2010 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EE2FA1065677; Thu, 29 Jul 2010 19:26:57 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id BF3BA8FC19; Thu, 29 Jul 2010 19:26:57 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 478FE46B2A; Thu, 29 Jul 2010 15:26:57 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 9E65F8A03C; Thu, 29 Jul 2010 15:26:56 -0400 (EDT) From: John Baldwin To: src-committers@freebsd.org Date: Thu, 29 Jul 2010 15:03:14 -0400 User-Agent: KMail/1.13.5 (FreeBSD/7.3-CBSD-20100217; KDE/4.4.5; amd64; ; ) References: <201007291844.o6TIiAeB023670@svn.freebsd.org> In-Reply-To: <201007291844.o6TIiAeB023670@svn.freebsd.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201007291503.14225.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Thu, 29 Jul 2010 15:26:56 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r210623 - in head/sys: amd64/include i386/include ia64/include X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Jul 2010 19:26:58 -0000 On Thursday, July 29, 2010 2:44:10 pm John Baldwin wrote: > Author: jhb > Date: Thu Jul 29 18:44:10 2010 > New Revision: 210623 > URL: http://svn.freebsd.org/changeset/base/210623 > > Log: > Mark the __curthread() functions as __pure2 and remove the volatile keyword > from the inline assembly. This allows the compiler to cache invocations of > curthread since it's value does not change within a thread context. Other platforms can add this feature if desired by adding a similar __curthread() inline function. curthread is a bit special in this regards as opposed to other per-CPU values. I think Peter originally added the __curthread() inline simply to speed up compile times as the PCPU_*() macros are a lot of work for the compiler, so that can be another reason to do it on other platforms. -- John Baldwin