From nobody Sun Dec 14 06:16:56 2025 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 31B3CC61D85 for ; Thu, 23 Nov 2023 11:06:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344935AbjKWLFx (ORCPT ); Thu, 23 Nov 2023 06:05:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344979AbjKWLFf (ORCPT ); Thu, 23 Nov 2023 06:05:35 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22F4DD59 for ; Thu, 23 Nov 2023 03:05:41 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5CE8AC433C9; Thu, 23 Nov 2023 11:05:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700737541; bh=tQoPadTOpEfcWFltgm4ylsWb6Qh7U5RzNAmqeA9wbms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b4qyrx9uuOYtARoBjjr3USSBbEXBVLT5+2YQt8UDuwSWOOjf/oxUtL6+Qaqgn1lHY U1iMAw+0oevXiM45qg8DWQRguuekx5nG/LH4T/UrhEC9jYaJLhnCSes0KEHDGJepMW EZa2UdrCcQC7mzu1KF1jgmLnI5rAwETjdiH0Pqww7458j+MaIjCDMCNfxUjRlNQ/f2 8QTqlMhE7BjvuWSLJEVDbQdNeHo+BAi/qGOnoD8MmIyKDc7pbImozDFyxKcmWK29M/ 8PW4kzF/3W9218KayKV8Z84KdQ6I+BiL/C/tm2vM4TkwgwH7TMj15madZX6mZcV3O9 R96xC7kcdciaA== From: Arnd Bergmann To: Andrew Morton Cc: Arnd Bergmann , "David S. Miller" , David Woodhouse , Dinh Nguyen , Greg Kroah-Hartman , Ivan Kokshaysky , John Paul Adrian Glaubitz , Michael Ellerman , Masahiro Yamada , Matt Turner , Nathan Chancellor , Nicolas Schier , Peter Zijlstra , Rich Felker , Richard Henderson , Richard Weinberger , Stephen Rothwell , Thomas Bogendoerfer , Tudor Ambarus , Yoshinori Sato , linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-mtd@lists.infradead.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v3 3/6] sched: fair: move unused stub functions to header Date: Thu, 23 Nov 2023 12:05:03 +0100 Message-Id: <20231123110506.707903-4-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231123110506.707903-1-arnd@kernel.org> References: <20231123110506.707903-1-arnd@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Arnd Bergmann These four functions have a normal definition for CONFIG_FAIR_GROUP_SCHED, and empty one that is only referenced when FAIR_GROUP_SCHED is disabled but CGROUP_SCHED is still enabled. If both are turned off, the functions are still defined but the misisng prototype causes a W=3D1 warning: kernel/sched/fair.c:12544:6: error: no previous prototype for 'free_fair_sc= hed_group' kernel/sched/fair.c:12546:5: error: no previous prototype for 'alloc_fair_s= ched_group' kernel/sched/fair.c:12553:6: error: no previous prototype for 'online_fair_= sched_group' kernel/sched/fair.c:12555:6: error: no previous prototype for 'unregister_f= air_sched_group' Move the alternatives into the header as static inline functions with the correct combination of #ifdef checks to avoid the warning without adding even more complexity. [A different patch with the same description got applied by accident and was later reverted, but the original patch is still missing] Fixes: 7aa55f2a5902 ("sched/fair: Move unused stub functions to header") Signed-off-by: Arnd Bergmann --- kernel/sched/fair.c | 13 ------------- kernel/sched/sched.h | 11 +++++++++++ 2 files changed, 11 insertions(+), 13 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 07f555857698..cb68d71c81bc 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -13040,19 +13040,6 @@ int sched_group_set_idle(struct task_group *tg, lo= ng idle) return 0; } =20 -#else /* CONFIG_FAIR_GROUP_SCHED */ - -void free_fair_sched_group(struct task_group *tg) { } - -int alloc_fair_sched_group(struct task_group *tg, struct task_group *paren= t) -{ - return 1; -} - -void online_fair_sched_group(struct task_group *tg) { } - -void unregister_fair_sched_group(struct task_group *tg) { } - #endif /* CONFIG_FAIR_GROUP_SCHED */ =20 =20 diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 8a70d51ffa33..eb7e07a1abcc 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -461,10 +461,21 @@ static inline int walk_tg_tree(tg_visitor down, tg_vi= sitor up, void *data) =20 extern int tg_nop(struct task_group *tg, void *data); =20 +#ifdef CONFIG_FAIR_GROUP_SCHED extern void free_fair_sched_group(struct task_group *tg); extern int alloc_fair_sched_group(struct task_group *tg, struct task_group= *parent); extern void online_fair_sched_group(struct task_group *tg); extern void unregister_fair_sched_group(struct task_group *tg); +#else +static inline void free_fair_sched_group(struct task_group *tg) { } +static inline int alloc_fair_sched_group(struct task_group *tg, struct tas= k_group *parent) +{ + return 1; +} +static inline void online_fair_sched_group(struct task_group *tg) { } +static inline void unregister_fair_sched_group(struct task_group *tg) { } +#endif + extern void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq, struct sched_entity *se, int cpu, struct sched_entity *parent); --=20 2.39.2