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=-9.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 44953C433DF for ; Tue, 25 Aug 2020 15:23:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A93920786 for ; Tue, 25 Aug 2020 15:23:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="OD7envjW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726391AbgHYPXT (ORCPT ); Tue, 25 Aug 2020 11:23:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726336AbgHYPXO (ORCPT ); Tue, 25 Aug 2020 11:23:14 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A69BC061574; Tue, 25 Aug 2020 08:23:14 -0700 (PDT) Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id F31BB9A5; Tue, 25 Aug 2020 17:23:08 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1598368989; bh=+ill/ZwwkhuFoJdnovdknow0Na//rSUqB2CNf3qkpuU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OD7envjWQAJrEAml+0DQ2452TNNYSfRGvyFs6++IeKv77xLHT9sFX9xSd09l+q0nU 1KbzerxZC2aFrQgCZbTznmP2opljNjrFaAHjd9JqFJHLwp5UvL2EdOgOOj6TlVQ6e7 RYJWa3VGMbigE/9h05xk2/3iUzXFsOU/YdCLUFDE= Date: Tue, 25 Aug 2020 18:22:49 +0300 From: Laurent Pinchart To: "Paul E. McKenney" Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] rcu-tasks: Fix compilation warning with !CONFIG_TASKS_RCU and CONFIG_TINY_RCU Message-ID: <20200825152249.GF6767@pendragon.ideasonboard.com> References: <20200823030405.22174-1-laurent.pinchart@ideasonboard.com> <20200825150222.GP2855@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200825150222.GP2855@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Paul, On Tue, Aug 25, 2020 at 08:02:22AM -0700, Paul E. McKenney wrote: > On Sun, Aug 23, 2020 at 06:04:05AM +0300, Laurent Pinchart wrote: > > Commit 8344496e8b49 ("rcu-tasks: Conditionally compile > > show_rcu_tasks_gp_kthreads()") introduced conditional compilation of > > several functions, but forgot one occurrence of > > show_rcu_tasks_classic_gp_kthread() that causes the compiler to warn of > > an unused static function. Fix it. > > > > Fixes: 8344496e8b49 ("rcu-tasks: Conditionally compile show_rcu_tasks_gp_kthreads()") > > Signed-off-by: Laurent Pinchart > > --- > > kernel/rcu/tasks.h | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h > > index 835e2df8590a..bddf3968c1eb 100644 > > --- a/kernel/rcu/tasks.h > > +++ b/kernel/rcu/tasks.h > > @@ -590,7 +590,9 @@ void exit_tasks_rcu_finish(void) __releases(&tasks_rcu_exit_srcu) > > } > > > > #else /* #ifdef CONFIG_TASKS_RCU */ > > +#ifndef CONFIG_TINY_RCU > > static void show_rcu_tasks_classic_gp_kthread(void) { } > > +#endif /* #ifndef CONFIG_TINY_RCU */ > > void exit_tasks_rcu_start(void) { } > > void exit_tasks_rcu_finish(void) { exit_tasks_rcu_finish_trace(current); } > > #endif /* #else #ifdef CONFIG_TASKS_RCU */ > > Good catch!!! > > But does the following addition of "static inline" work for you? They do. I initially added a static inline, and realized #ifdef was used extensively when trying to find the proper Fixes: tag, so I went for that. I don't mind either way, as long as this gets fixed :-) > ------------------------------------------------------------------------ > > diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h > index 835e2df..3dc3ffc 100644 > --- a/kernel/rcu/tasks.h > +++ b/kernel/rcu/tasks.h > @@ -590,9 +590,9 @@ void exit_tasks_rcu_finish(void) __releases(&tasks_rcu_exit_srcu) > } > > #else /* #ifdef CONFIG_TASKS_RCU */ > -static void show_rcu_tasks_classic_gp_kthread(void) { } > -void exit_tasks_rcu_start(void) { } > -void exit_tasks_rcu_finish(void) { exit_tasks_rcu_finish_trace(current); } > +static inline void show_rcu_tasks_classic_gp_kthread(void) { } > +static inline void exit_tasks_rcu_start(void) { } > +static inline void exit_tasks_rcu_finish(void) { exit_tasks_rcu_finish_trace(current); } > #endif /* #else #ifdef CONFIG_TASKS_RCU */ > > #ifdef CONFIG_TASKS_RUDE_RCU -- Regards, Laurent Pinchart