From mboxrd@z Thu Jan 1 00:00:00 1970 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 89E55270565 for ; Wed, 28 May 2025 08:11:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748419901; cv=none; b=ts0mCaSflbHHBTgYDbZjCWtgR3yV0998EmmvW7JZDq4lKuhOc5F5uz2sQSBGhujShQjLPHMSpYUz163x8bdKNgxXeyPBKFb1Yv9uKOZJSYUD4j5h9IXyMqSwmi/1v1CbVmCV71RavFF36ZsQQu2StbPUu9QViMO7sDNji5m5OeY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748419901; c=relaxed/simple; bh=HhJn8+Bkf3Al4z35LmUKeudBi8itfc26hNtt4GX4IZE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gYG4gwGS1G/g3NqBOZmCHfgVnrmpF7dQTNL5Bm4d0wA3z87stGRUVjTSoshAk4aHCwxAd4Uv1jvCycaFit8TvxOkCebkiEtOEsg8GF+QYEhPQHc2d2MqVJTwYWq6uEGwHPDvZmmsG8O4MtCCPN8on+xT5PKVZi9nnpUlrU7c9CM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Cf5HRH+j; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Cf5HRH+j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 630E1C4CEE7; Wed, 28 May 2025 08:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748419901; bh=HhJn8+Bkf3Al4z35LmUKeudBi8itfc26hNtt4GX4IZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cf5HRH+jVr5Kcj9KAZiD76SB/UAwUOAq0MNQW9KooocId91THoq7DcSLyL4i9dMBY VQql1n/AFRyYTMK3bYsO3dd0rj/Icp/rCDQIHoc9Oq8TfSiYSn0fxxcwjFhr92mASi rjuIeBScLORL4RdqqE+6cX+lR4PtHU5/gAHmBzEtuQhUYbUVN1DfCRERrs1VJ1WHsL cJ/sjngf5UYlI4DCmQ9smFpQJO/vYJr4CB4THLXiO5kbtOM9NtVm8lgfYH62XliIaD IlGka7KfI9EdQ0lGVxXgG3G0BWVx6eg4m6r9yH2Ivbd6j52Hu7654bIRlok2rucWti 8aKZNuwwRcvDg== From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Dietmar Eggemann , Linus Torvalds , Peter Zijlstra , Shrikanth Hegde , Thomas Gleixner , Valentin Schneider , Steven Rostedt , Mel Gorman , Vincent Guittot , Sebastian Andrzej Siewior , Ingo Molnar , Juri Lelli Subject: [PATCH 32/43] sched/smp: Use the SMP version of the scheduler syscalls Date: Wed, 28 May 2025 10:09:13 +0200 Message-ID: <20250528080924.2273858-33-mingo@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250528080924.2273858-1-mingo@kernel.org> References: <20250528080924.2273858-1-mingo@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Simplify the scheduler by making formerly SMP-only primitives and data structures unconditional. Signed-off-by: Ingo Molnar Cc: Dietmar Eggemann Cc: Juri Lelli Cc: Linus Torvalds Cc: Mel Gorman Cc: Peter Zijlstra Cc: Shrikanth Hegde Cc: Steven Rostedt Cc: Valentin Schneider Cc: Vincent Guittot --- kernel/sched/syscalls.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/sched/syscalls.c b/kernel/sched/syscalls.c index d7fccf871c7d..77ae87f36e84 100644 --- a/kernel/sched/syscalls.c +++ b/kernel/sched/syscalls.c @@ -209,10 +209,8 @@ int idle_cpu(int cpu) if (rq->nr_running) return 0; -#ifdef CONFIG_SMP if (rq->ttwu_pending) return 0; -#endif return 1; } @@ -641,7 +639,6 @@ int __sched_setscheduler(struct task_struct *p, goto unlock; } #endif /* CONFIG_RT_GROUP_SCHED */ -#ifdef CONFIG_SMP if (dl_bandwidth_enabled() && dl_policy(policy) && !(attr->sched_flags & SCHED_FLAG_SUGOV)) { cpumask_t *span = rq->rd->span; @@ -657,7 +654,6 @@ int __sched_setscheduler(struct task_struct *p, goto unlock; } } -#endif /* CONFIG_SMP */ } /* Re-check policy now with rq lock held: */ @@ -1239,7 +1235,7 @@ long sched_setaffinity(pid_t pid, const struct cpumask *in_mask) user_mask = alloc_user_cpus_ptr(NUMA_NO_NODE); if (user_mask) { cpumask_copy(user_mask, in_mask); - } else if (IS_ENABLED(CONFIG_SMP)) { + } else { return -ENOMEM; } -- 2.45.2