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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 997F3C433F5 for ; Tue, 22 Mar 2022 15:20:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238701AbiCVPVn (ORCPT ); Tue, 22 Mar 2022 11:21:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238647AbiCVPV0 (ORCPT ); Tue, 22 Mar 2022 11:21:26 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CBA5888EB; Tue, 22 Mar 2022 08:19:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=82Iai9rshD4beiVR/j7WhNo1cfOZSCSdMFJeraPEq2g=; b=da9HiTmJD+ymSvajQWByZu8GUx 86F+53OJsDWx617vaeyp46vNQgmSe2zo/Sq4RUl7edRnmisEdLfMi9Fxe16tctKyR4cwAanPhD3A1 xAZOQlanU7pMAM0exWcHANDTxu8n+y7fY7ANgHdUMygeoY24iGq+N6L1kOaobHsNc0fiRVqhxo7nd rdtoe9T1KKM7U0SPgdV3OJd6AUp3Ig11ie4bJD2+1m+cn5LU369xSYtC17R4oCUs7IH/RYxT48lEl RJglRD24J5uIWzLAshq5sqSsahGx5+n0RLHLR5C4WIc7kOgV8C3RfRiJhTLmm3gIeAnm7Y5c4bnQb YKxs6KRg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nWgI3-00BhxY-9w; Tue, 22 Mar 2022 15:19:19 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1372430007E; Tue, 22 Mar 2022 16:19:16 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id D436D31AA29F5; Tue, 22 Mar 2022 16:19:16 +0100 (CET) Date: Tue, 22 Mar 2022 16:19:16 +0100 From: Peter Zijlstra To: Steven Rostedt Cc: Stephen Rothwell , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Linux Kernel Mailing List , Linux Next Mailing List , mhiramat@kernel.org, ast@kernel.org, hjl.tools@gmail.com, rick.p.edgecombe@intel.com, rppt@kernel.org, linux-toolchains@vger.kernel.org, Andrew.Cooper3@citrix.com, ndesaulniers@google.com Subject: Re: linux-next: build warnings after merge of the tip tree Message-ID: References: <20220321121209.3b95e406@gandalf.local.home> <20220321121549.1c8588c5@gandalf.local.home> <20220321124551.3d73660b@gandalf.local.home> <20220321125419.0a20415c@gandalf.local.home> <20220322091242.1ad0206b@gandalf.local.home> <20220322110438.25c2a760@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220322110438.25c2a760@gandalf.local.home> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 22, 2022 at 11:04:38AM -0400, Steven Rostedt wrote: > On Tue, 22 Mar 2022 15:35:54 +0100 > Peter Zijlstra wrote: > > I suggested inhibiting tail-call to notrace, you said no. You now seem to > > agree that solves it. > > I said inhibiting tail-calls was a solution, but only inhibiting it to > notrace would probably have a significant performance impact. > > I thought you were talking about adding notrace to tail calls, not the > other way around. Maybe that is our confusion in this conversation. Yeah, I meant inhibiting the compiler from doing tail-calls.