From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756500Ab1FFRWW (ORCPT ); Mon, 6 Jun 2011 13:22:22 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:43765 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756273Ab1FFRWU (ORCPT ); Mon, 6 Jun 2011 13:22:20 -0400 Date: Mon, 6 Jun 2011 19:22:09 +0200 From: Ingo Molnar To: Dave Anderson , Andy Lutomirski Cc: linux-kernel@vger.kernel.org, andi@firstfloor.org, jstancek@redhat.com, Thomas Gleixner , "H. Peter Anvin" Subject: Re: [PATCH] x86-64: Prevent gcc from optimizing away venosys_1() Message-ID: <20110606172209.GH2391@elte.hu> References: <313387488.1201.1307114323524.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> <2060873692.1232.1307114423575.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2060873692.1232.1307114423575.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Dave Anderson wrote: > One of the changes in commit a4928cffe6435caf427ae673131a633c1329dbf3 > made the venosys_1() system call static, which causes it to be > optimized out of the kernel: > > Author: Ingo Molnar > Date: Wed Apr 23 13:20:56 2008 +0200 > > "make namespacecheck" fixes > > Signed-off-by: Ingo Molnar Andy noticed this recently, so we got rid of that broken (and unused) syscall in: bb5fe2f78ead: x86-64: Remove vsyscall number 3 (venosys) which is in the tip:x86/vdso branch at: http://people.redhat.com/mingo/tip.git/README Thanks, Ingo