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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 71604C28CBC for ; Wed, 6 May 2020 18:37:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EC2D20736 for ; Wed, 6 May 2020 18:37:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Go/JeZr+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730464AbgEFSho (ORCPT ); Wed, 6 May 2020 14:37:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729757AbgEFShn (ORCPT ); Wed, 6 May 2020 14:37:43 -0400 Received: from merlin.infradead.org (unknown [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0941C061A0F for ; Wed, 6 May 2020 11:37:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ecKITwvkyDkNKn9u2BusQHHoxShGXH+9vqmdM5Woe18=; b=Go/JeZr+oeZAXggliMUwX0LMis Cyz+HB3eo+65ZwW8Jhf54OTUg4Ch2Yg4UTwg9wz0onAcXgZVTAK1/L1nep+htuOiwGVjWuLLXtdfL 9XOFNAg7JeBXlD/aUsIJOf6BixJA/XBo3dDcK75mvPVnVEk8hVscsSnbUJeFWGpaXN21fGFG+v65U aFeT1fci/AzgVzOOAK+Z9Bo42v23wIir4lvEnB2rPDf+/dherhnXvO6fwmIztyyS04I+MEYXsPsRz DjW4ZF14pApQDXdFTCU4CApHYybp2cNvEzG4HhdpdLLROIwpzkl+WewV1j4mtFCXYXtwQBt38GcBa cl/WLetw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jWOuo-0001dP-0k; Wed, 06 May 2020 18:37:06 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 03598301DFD; Wed, 6 May 2020 20:37:03 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id CFDEC2B87C19A; Wed, 6 May 2020 20:37:03 +0200 (CEST) Date: Wed, 6 May 2020 20:37:03 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Alexandre Chartre , Thomas Gleixner , LKML , x86@kernel.org, Andy Lutomirski , 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 Subject: Re: [patch V4 part 1 03/36] sched: Clean up scheduler_ipi() Message-ID: <20200506183703.GJ5298@hirez.programming.kicks-ass.net> References: <20200505131602.633487962@linutronix.de> <20200505134058.361859938@linutronix.de> <20200506153300.GB5281@hirez.programming.kicks-ass.net> <20200506182856.GD2869@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200506182856.GD2869@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 06, 2020 at 11:28:56AM -0700, Paul E. McKenney wrote: > I still see warnings of the form "leave instruction with modified stack > frame" from older complilers and of the form "undefined stack state" > from newer compilers. I am running stock objtool versions, so I am > guessing that this is at least one reason for these warnings. Part 5, patch 2, might be responsible. I still have to look at curing that.