From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B854C433DF for ; Thu, 14 May 2020 04:57:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8647A206D8 for ; Thu, 14 May 2020 04:57:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589432247; bh=Lte4B9W8zW8d5KMicJ/udk+nHQDdtuOAvFltY0KBD08=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=T3n/GL7HX8IKZQZYHcOsvMIRBED2wH6BWR3sqnNLXQQBvj3DS6Jeet3oTi0ghEJit Cts07KvzUZMmlCYn+nfafv8ImJVUseYT6c3zHRavuTp9SjMzDKtOJxK/QwdJm4meeW XjLA/jnMflVFlmdlMFQ5FFFt4zLBeXCPG89QTff4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726031AbgENE50 (ORCPT ); Thu, 14 May 2020 00:57:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:40024 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725794AbgENE50 (ORCPT ); Thu, 14 May 2020 00:57:26 -0400 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A3CFF20734 for ; Thu, 14 May 2020 04:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589432245; bh=Lte4B9W8zW8d5KMicJ/udk+nHQDdtuOAvFltY0KBD08=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=O5Hv25Iey76uaYgemEZ9MYmy4MpRywmODNENvrAcPnWOOrJRPge/Te6sN9Cq5W0QM kuZCpppMj7/rPo1mK502CBWKBpRazvowvPpobQhb9aGPedBBlAnzrJ2v5yGJ99I3NG mtyCw3Y4NRtCJ7JrW4F0mdkLCRbjR56eh2xg4KPU= Received: by mail-wm1-f51.google.com with SMTP id u16so30873054wmc.5 for ; Wed, 13 May 2020 21:57:25 -0700 (PDT) X-Gm-Message-State: AGi0PubsWLtteJVaW0euEhMC+56RLHkS4AzJygkjEFNe2dBlAlYImYW0 8PC3exxQAPqGl8yylYjDjF6o/8xrbi5V+mtrP7k/Hg== X-Google-Smtp-Source: APiQypKrIQvWFM7EQquJSqdEwgN5VUXbceYvnW5X+NMjZi66eekOuooPwPJgNozPSGt3hk+XzJQjmP7IJXx9UvGuW2Q= X-Received: by 2002:a1c:2bc2:: with SMTP id r185mr22240467wmr.49.1589432244035; Wed, 13 May 2020 21:57:24 -0700 (PDT) MIME-Version: 1.0 References: <20200505134926.578885807@linutronix.de> <20200505135313.410702173@linutronix.de> In-Reply-To: <20200505135313.410702173@linutronix.de> From: Andy Lutomirski Date: Wed, 13 May 2020 21:57:12 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [patch V4 part 4 01/24] x86/int3: Ensure that poke_int3_handler() is not traced To: Thomas Gleixner Cc: LKML , X86 ML , "Paul E. McKenney" , Andy Lutomirski , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon , "Peter Zijlstra (Intel)" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 5, 2020 at 7:15 AM Thomas Gleixner wrote: > > From: Thomas Gleixner > > In order to ensure poke_int3_handler() is completely self contained -- this > is called while modifying other text, imagine the fun of hitting another > INT3 -- ensure that everything it uses is not traced. > > The primary means here is to force inlining; bsearch() is notrace because > all of lib/ is. Acked-by: Andy Lutomirski