From nobody Sat Feb 7 09:28:00 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 C4796340DB1 for ; Wed, 15 Oct 2025 17:29:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760549379; cv=none; b=dWqf/kluPyfKmIB0CLxmukVKT0+OinbDpTCUbqlTqxfPlEE7uuwAwI95VCGNXJKtEutOxPI7uMfISELiO7YWo8avLEQCpbGNx0gD6DEgVjhGHx9Xftt7zy0DEumZIRnuAxks3PJbQxpAf8MQoxZYbgVMLLgP182Hca8TbP2LKEU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760549379; c=relaxed/simple; bh=7fpwOABA3SzrIN9DCSw4qLEkvmleWEchFx4lA/unLrw=; h=Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type:Date; b=OGfsG7IVOQhJZlvMfPxW6uwB/0Gt9u036QV7FtgJ8SNSihSCDD6EG+ESMWrq0AfSm3yzcQs1dWniwWbgjFv0HZ676oQMU2NW1oseMD+b7cfnIplDmLMGSvyMaOvyuo2Hsb+IsQTKaXBGJTUP01hn9hVQqYC6qvlfWAU6rMQJeUA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=Cy5jyVUq; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=BEYff9w4; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Cy5jyVUq"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="BEYff9w4" Message-ID: <20251015172834.631482357@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1760549373; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=79E8Bkn/ABS3eLdwGxQjGfkAWpdXEHtzjpjYM5kWPc0=; b=Cy5jyVUqXcNivDkPeTjWFXB3ReLXinHn7eiiev+r2cDxZg5JrP4+nU5T8Zl51wAw9ePOjT sXBATlX9RKqNqn3lYFkK6FtN1z6VlBjXiuztxKyfEQ0iSF+ygFAh4pEwQ7fbd1dZa9ev52 YY3AHbCTrTUKIONamGhWxC9V9yQ1XgycQlRNHruFH1LeANF2m0CfsmPORkAC6+L2HugfRo MlKmOZBX4p5y0JDb4g37S8wClnsz3UCitc8Y293+2alHCMKdQgHINt6CCMdNnvCjijT4kR ZLs5l5z2rHVkuocwHnooedqc+FNfqJ/4p95sZuU64GGD6QWK8MmN02g0SsH5XA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1760549373; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=79E8Bkn/ABS3eLdwGxQjGfkAWpdXEHtzjpjYM5kWPc0=; b=BEYff9w4t55VbgMm7qnr/dbOvDVnXls5XjImYBK81a4L9kH+4QV9FynE/C+92XimpxzN+l IxDqtIyPRYDIQ9Bg== From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Gabriele Monaco , Mathieu Desnoyers , Michael Jeanson , Jens Axboe , "Paul E. McKenney" , "Gautham R. Shenoy" , Florian Weimer , Tim Chen , TCMalloc Team Subject: [patch 05/19] sched/mmcid: Move scheduler code out of global header References: <20251015164952.694882104@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Wed, 15 Oct 2025 19:29:32 +0200 (CEST) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This is only used in the scheduler core code, so there is no point to have it in a global header. Signed-off-by: Thomas Gleixner --- include/linux/mm_types.h | 13 ------------- kernel/sched/core.c | 20 ++++++++++++++++++-- 2 files changed, 18 insertions(+), 15 deletions(-) --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -1341,27 +1341,14 @@ static inline unsigned int mm_cid_size(v return 2 * cpumask_size(); /* mm_cpus_allowed(), mm_cidmask(). */ } =20 -static inline void mm_set_cpus_allowed(struct mm_struct *mm, const struct = cpumask *cpumask) -{ - struct cpumask *mm_allowed =3D mm_cpus_allowed(mm); - - if (!mm) - return; - /* The mm_cpus_allowed is the union of each thread allowed CPUs masks. */ - guard(raw_spinlock)(&mm->mm_cid.lock); - cpumask_or(mm_allowed, mm_allowed, cpumask); - WRITE_ONCE(mm->mm_cid.nr_cpus_allowed, cpumask_weight(mm_allowed)); -} #else /* CONFIG_SCHED_MM_CID */ static inline void mm_init_cid(struct mm_struct *mm, struct task_struct *p= ) { } static inline int mm_alloc_cid(struct mm_struct *mm, struct task_struct *p= ) { return 0; } static inline void mm_destroy_cid(struct mm_struct *mm) { } - static inline unsigned int mm_cid_size(void) { return 0; } -static inline void mm_set_cpus_allowed(struct mm_struct *mm, const struct = cpumask *cpumask) { } #endif /* CONFIG_SCHED_MM_CID */ =20 struct mmu_gather; --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2704,6 +2704,8 @@ int push_cpu_stop(void *arg) return 0; } =20 +static inline void mm_update_cpus_allowed(struct mm_struct *mm, const cpum= ask_t *affmask); + /* * sched_class::set_cpus_allowed must do the below, but is not required to * actually call this function. @@ -2763,7 +2765,7 @@ static void put_prev_task(rq, p); =20 p->sched_class->set_cpus_allowed(p, ctx); - mm_set_cpus_allowed(p->mm, ctx->new_mask); + mm_update_cpus_allowed(p->mm, ctx->new_mask); =20 if (queued) enqueue_task(rq, p, ENQUEUE_RESTORE | ENQUEUE_NOCLOCK); @@ -10404,6 +10406,18 @@ void call_trace_sched_update_nr_running( * When a task exits, the MM CID held by the task is not longer required as * the task cannot return to user space. */ +static inline void mm_update_cpus_allowed(struct mm_struct *mm, const stru= ct cpumask *affmsk) +{ + struct cpumask *mm_allowed =3D mm_cpus_allowed(mm); + + if (!mm) + return; + /* The mm_cpus_allowed is the union of each thread allowed CPUs masks. */ + guard(raw_spinlock)(&mm->mm_cid.lock); + cpumask_or(mm_allowed, mm_allowed, affmsk); + WRITE_ONCE(mm->mm_cid.nr_cpus_allowed, cpumask_weight(mm_allowed)); +} + void sched_mm_cid_exit_signals(struct task_struct *t) { struct mm_struct *mm =3D t->mm; @@ -10443,7 +10457,9 @@ void sched_mm_cid_fork(struct task_struc WARN_ON_ONCE(!t->mm || t->mm_cid.cid !=3D MM_CID_UNSET); t->mm_cid.active =3D 1; } -#endif /* CONFIG_SCHED_MM_CID */ +#else /* CONFIG_SCHED_MM_CID */ +static inline void mm_update_cpus_allowed(struct mm_struct *mm, const stru= ct cpumask *affmsk) { } +#endif /* !CONFIG_SCHED_MM_CID */ =20 #ifdef CONFIG_SCHED_CLASS_EXT void sched_deq_and_put_task(struct task_struct *p, int queue_flags,