From patchwork Wed Nov 8 12:58:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 742560 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30B21182A2; Wed, 8 Nov 2023 13:00:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IVsQ8P2d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C32BFC433C7; Wed, 8 Nov 2023 13:00:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699448446; bh=AsWQYHzG9sipb7sEr1JLntaPFi93f1pC9EyAKGQfMYU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IVsQ8P2dntVCqOp290JiIjSeAiJc+VMO2pw8M5wXect2MBBRk+jOoldL7GU96ZMeA HuTE9Cemzwdgusy0jqMNAGrkZljxwDe/bga3g2m7k9eEuDPGq3KBsmaI6dmPkl/wlE 2sJ8x5zpsds68NNoBAImql8aGu/sRESukQSJx2yQtofDYlD6qoDUcqJIsRbgMEAgD5 pBWkZwSHNGyEjrYKkBLIDiDk/X/C6tnjuGAPAvyQxIP+Clu91AntgrZdhbNIFgmOBm NDqic6B3ehDAmy+JcPX7W+ZFcv2EJF1l6Qv/grGtIBAqxH+1Q7icIKEapV1+6GP4HA hAP9sw3MNsZDA== From: Arnd Bergmann To: Andrew Morton , linux-kernel@vger.kernel.org, Masahiro Yamada , linux-kbuild@vger.kernel.org Cc: Arnd Bergmann , Matt Turner , Vineet Gupta , Russell King , Catalin Marinas , Will Deacon , Steven Rostedt , Masami Hiramatsu , Mark Rutland , Guo Ren , Peter Zijlstra , Ard Biesheuvel , Huacai Chen , Greg Ungerer , Michal Simek , Thomas Bogendoerfer , Dinh Nguyen , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Geoff Levand , Palmer Dabbelt , Heiko Carstens , John Paul Adrian Glaubitz , "David S. Miller" , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , x86@kernel.org, Helge Deller , Sudip Mukherjee , Greg Kroah-Hartman , Timur Tabi , Kent Overstreet , David Woodhouse , "Naveen N. Rao" , Anil S Keshavamurthy , Kees Cook , Vincenzo Frascino , Juri Lelli , Vincent Guittot , Nathan Chancellor , Nick Desaulniers , Nicolas Schier , Al Viro , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-trace-kernel@vger.kernel.org, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, netdev@vger.kernel.org, linux-parisc@vger.kernel.org, linux-usb@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-bcachefs@vger.kernel.org, linux-mtd@lists.infradead.org Subject: [PATCH 07/22] [RESEND] sched: fair: move unused stub functions to header Date: Wed, 8 Nov 2023 13:58:28 +0100 Message-Id: <20231108125843.3806765-8-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231108125843.3806765-1-arnd@kernel.org> References: <20231108125843.3806765-1-arnd@kernel.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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=1 warning: kernel/sched/fair.c:12544:6: error: no previous prototype for 'free_fair_sched_group' kernel/sched/fair.c:12546:5: error: no previous prototype for 'alloc_fair_sched_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_fair_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 --- A patch with the same commit log has --- 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 2048138ce54b..82b82fa1d81b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -12927,19 +12927,6 @@ int sched_group_set_idle(struct task_group *tg, long idle) return 0; } -#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 *parent) -{ - 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 */ diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 2e5a95486a42..8f5df5250b8d 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -436,10 +436,21 @@ static inline int walk_tg_tree(tg_visitor down, tg_visitor up, void *data) extern int tg_nop(struct task_group *tg, void *data); +#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 task_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);