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[23.128.96.18]) by mx.google.com with ESMTP id y7si5948143edd.286.2021.10.28.09.27.15; Thu, 28 Oct 2021 09:27:39 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b="px2camd/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230337AbhJ1QYh (ORCPT + 99 others); Thu, 28 Oct 2021 12:24:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57860 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230281AbhJ1QYg (ORCPT ); Thu, 28 Oct 2021 12:24:36 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB7A9C061570 for ; Thu, 28 Oct 2021 09:22:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=8OIg0NSW0Sgb49bZ3aqFYzjaigYZAy698PanjorKZw4=; b=px2camd/geKtOVcvnFOy4WaRwj 6T4dS1bLToxgXERXK16gnmOK26hKZFlJAAOU9YUBAdXU5m3FQYdqfs9VM19Xm0nQUXlNILWXzLHQt X3+oSbYbBiFHLl4U79o0hkeGxaOWBhbnZ9dUC4nA1X7OfahxdxHLOFEF30lHt1SfbVcmRzpLtogoJ q7ZcjInVGXFmw0Xdt95b62+pIBbM3xkKPCGRQFRaxD/V6IJDbG0s5WGYVe0n0ppm395MsEAZRqZoq Lk5uyWWvrA7tXdscFJakx8G+lOD+13wYfz9ygzxLjWnLRw+q9Ld0bXhHzpzHHwJAt/CxnXBtetbxD Ks9aDK2A==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mg8AH-008ZJo-ME; Thu, 28 Oct 2021 16:22:05 +0000 Date: Thu, 28 Oct 2021 09:22:05 -0700 From: Christoph Hellwig To: Peter Zijlstra Cc: Christoph Hellwig , Qais Yousef , Ingo Molnar , Dietmar Eggemann , Vincent Guittot , Thara Gopinath , linux-kernel@vger.kernel.org Subject: Re: [PATCH] sched/core: Export pelt_thermal_tp Message-ID: References: <20211028115005.873539-1-qais.yousef@arm.com> <20211028161855.GN174703@worktop.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211028161855.GN174703@worktop.programming.kicks-ass.net> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 28, 2021 at 06:18:55PM +0200, Peter Zijlstra wrote: > > > @@ -36,6 +36,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_rt_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_dl_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_irq_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_se_tp); > > > +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_thermal_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_cpu_capacity_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_overutilized_tp); > > > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_cfs_tp); > > > > ... and while we're at it, all these exports are unused and should > > be deleted as well. > > This is my concession wrt tracepoints. Actual tracepoints are ABI, > exports are in-kernel interfaces and are explicitly not ABI. > > This way people can use an external module to get at the tracepoint data > without having in-tree tracepoints. All of this makes no sense at all. These are entirely dead exports. If you remove them nothing else changes. Note taht the tracepoints do have in-kernel callers, so if people thing of them as an ABI you've got your ABI already with or without the exports.