Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp5179626yba; Tue, 30 Apr 2019 10:22:08 -0700 (PDT) X-Google-Smtp-Source: APXvYqzftMCD2+h5GGoUhVZ3V+Nj1uNfbqf1fGPz5c8rf9+Y9RJDUnVRK6l0bumYZpcYlqbxDQZe X-Received: by 2002:a17:902:54c:: with SMTP id 70mr71777324plf.210.1556644928379; Tue, 30 Apr 2019 10:22:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1556644928; cv=none; d=google.com; s=arc-20160816; b=ws1uoIc5jqR/psOKdf/Og0DrOfoiCId3R+cfN1ixR5cVTparIi13O6RuQabAGuENyx A3dg3DXyV0U3WhOEnWRMnXy9P7F2K5xMMHz0xEWcsBBnqFM8uDTGCMZXlegs/jM5na5J IpsnLpCxh1tKPTSgU08Us05+ZFo4AZ+TOcLA/aQ/THtEGxSFgGnZ+1lqWNxFOwLQAGxX cKYYQJWHMCSHzbBRmyzV91PzsVQXfpqbs9d68SAabhZiB2vbqn5cQRq5qamM4FfnQzze TPtSHky5RcHZBo/cTH+L0Oz7fLE8b45bIgjaqUG4/o1BOpq/15P4BQQ6cGGw20q/vTR+ bHqg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=Vdb9E0rOdmkHGf0FdxJA4n4nIssxJR2OLuHBOyosVp8=; b=QZ8gA8s0jGpHYDDX8krH4Dv0yoJQJQxuGgxcx2i5QkpWxTrGst+jz6OmF9Fm6AzHBl JdJt/2ngQ2y0hOUCfabSSBoVOldvuDnWL48pJESkrQJOLQt/JlicNfqbgdH1B9vEpHTp cJjwrBY93JiEmO9UJvMnUOoDeupX6H/Kz+yoiKNz6tvT4ZLbSr8l6i79wm8R+8gj9uZJ efU71yECkOIdaRyTSBQRb8FyufmvkxvMtecogEp3VrR/SQBUVJREPg+42/im+MIBYnV9 UQVlwdzHY0FSzUIyrYn59FRvoQHTEJl7P18FLyIxIJm5l/y8bqDxdsimUfIcljb4cAFh 8SQw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id bj6si21988131plb.379.2019.04.30.10.21.52; Tue, 30 Apr 2019 10:22:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726934AbfD3RU3 (ORCPT + 99 others); Tue, 30 Apr 2019 13:20:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:44232 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725942AbfD3RU3 (ORCPT ); Tue, 30 Apr 2019 13:20:29 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A4B1020651; Tue, 30 Apr 2019 17:20:26 +0000 (UTC) Date: Tue, 30 Apr 2019 13:20:24 -0400 From: Steven Rostedt To: Andy Lutomirski Cc: Linus Torvalds , Peter Zijlstra , Nicolai Stange , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , "the arch/x86 maintainers" , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Joe Lawrence , Shuah Khan , Konrad Rzeszutek Wilk , Tim Chen , Sebastian Andrzej Siewior , Mimi Zohar , Juergen Gross , Nick Desaulniers , Nayna Jain , Masahiro Yamada , Joerg Roedel , Linux List Kernel Mailing , live-patching@vger.kernel.org, "open list:KERNEL SELFTEST FRAMEWORK" Subject: Re: [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation Message-ID: <20190430132024.0f03f5b8@gandalf.local.home> In-Reply-To: <20190430130359.330e895b@gandalf.local.home> References: <20190428133826.3e142cfd@oasis.local.home> <20190430135602.GD2589@hirez.programming.kicks-ass.net> <20190430130359.330e895b@gandalf.local.home> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 30 Apr 2019 13:03:59 -0400 Steven Rostedt wrote: > I also prefer Josh's stack shift solution, as I personally believe > that's a cleaner solution. But I went ahead and implemented Linus's > version to get it working for ftrace. Here's the code, and it survived > some preliminary tests. Well it past the second level of tests. If this is the way we are going, I could add comments to the code and apply it to my queue and run it through the rest of my test suite and make it ready for the merge window. I may add a stable tag to it to go back to where live kernel patching was added, as it fixes a potential bug there. -- Steve