From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1423784Ab2LGSR3 (ORCPT <rfc822;w@1wt.eu>);
	Fri, 7 Dec 2012 13:17:29 -0500
Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:25775 "EHLO
	hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1423574Ab2LGSR1 (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Fri, 7 Dec 2012 13:17:27 -0500
X-Authority-Analysis: v=2.0 cv=f9bK9ZOM c=1 sm=0 a=rXTBtCOcEpjy1lPqhTCpEQ==:17 a=mNMOxpOpBa8A:10 a=0q0mCv_Vr9gA:10 a=5SG0PmZfjMsA:10 a=Q9fys5e9bTEA:10 a=meVymXHHAAAA:8 a=lrIq2vSOvhQA:10 a=FwqeT2Wgn1AdykfBn74A:9 a=PUjeQqilurYA:10 a=rXTBtCOcEpjy1lPqhTCpEQ==:117
X-Cloudmark-Score: 0
X-Authenticated-User: 
X-Originating-IP: 74.67.115.198
Message-ID: <1354904245.17101.66.camel@gandalf.local.home>
Subject: Re: [PATCH] ARM: ftrace: Ensure code modifications are synchronised
 across all cpus
From: Steven Rostedt <rostedt@goodmis.org>
To: "Jon Medhurst (Tixy)" <tixy@linaro.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>,
        linux-arm-kernel@lists.infradead.org, Ingo Molnar <mingo@redhat.com>,
        Frederic Weisbecker <fweisbec@gmail.com>, Rabin Vincent <rabin@rab.in>,
        linux-kernel@vger.kernel.org
Date: Fri, 07 Dec 2012 13:17:25 -0500
In-Reply-To: <1354903568.17101.65.camel@gandalf.local.home>
References: <1354817466.30905.13.camel@linaro1.home>
	 <1354821581.17101.17.camel@gandalf.local.home>
	 <1354872138.3176.15.camel@computer5.home>
	 <1354888985.17101.41.camel@gandalf.local.home>
	 <1354892111.13000.50.camel@linaro1.home>
	 <1354894134.17101.44.camel@gandalf.local.home>
	 <20121207162346.GW14363@n2100.arm.linux.org.uk>
	 <1354898200.17101.50.camel@gandalf.local.home>
	 <20121207164530.GX14363@n2100.arm.linux.org.uk>
	 <1354900436.17101.58.camel@gandalf.local.home>
	 <1354902347.8263.12.camel@linaro1.home>
	 <1354903568.17101.65.camel@gandalf.local.home>
Content-Type: text/plain; charset="ISO-8859-15"
X-Mailer: Evolution 3.4.4-1 
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, 2012-12-07 at 13:06 -0500, Steven Rostedt wrote:

> If you can get away with that, sure. Or better yet. If the arch supports
> it, you can do what I did with powerpc. That was just replace the nop
> with the 32bit branch, and the 32bit branch with a 32bit nop. No nops.

s/No nops/No breakpoints/

> No multiple steps in between. I just did the swap of all function
> tracepoints in one fell swoop, and then did the icache sync.
> 

-- Steve