From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755162Ab0IQSVC (ORCPT ); Fri, 17 Sep 2010 14:21:02 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:40233 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751435Ab0IQSVB (ORCPT ); Fri, 17 Sep 2010 14:21:01 -0400 Date: Fri, 17 Sep 2010 11:21:19 -0700 (PDT) Message-Id: <20100917.112119.141239689.davem@davemloft.net> To: jbaron@redhat.com Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, mathieu.desnoyers@polymtl.ca, hpa@zytor.com, tglx@linutronix.de, rostedt@goodmis.org, andi@firstfloor.org, roland@redhat.com, rth@redhat.com, mhiramat@redhat.com, fweisbec@gmail.com, avi@redhat.com, vgoyal@redhat.com, sam@ravnborg.org, tony@bakeyournoodle.com Subject: Re: [PATCH 03/10] jump label v11: base patch From: David Miller In-Reply-To: References: X-Mailer: Mew version 6.3 on Emacs 23.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Baron Date: Fri, 17 Sep 2010 11:09:00 -0400 > base patch to implement 'jump labeling'. Based on a new 'asm goto' inline > assembly gcc mechanism, we can now branch to labels from an 'asm goto' > statment. This allows us to create a 'no-op' fastpath, which can subsequently > be patched with a jump to the slowpath code. This is useful for code which > might be rarely used, but which we'd like to be able to call, if needed. > Tracepoints are the current usecase that these are being implemented for. > > Signed-off-by: Jason Baron Acked-by: David S. Miller