linux-kernel - [patch 11/19] sched/mmcid: Move initialization out of line

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Message-ID: <20251015172835.007019151@linutronix.de>
Date: Wed, 15 Oct 2025 19:29:44 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
 Gabriele Monaco <gmonaco@...hat.com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Michael Jeanson <mjeanson@...icios.com>,
 Jens Axboe <axboe@...nel.dk>,
 "Paul E. McKenney" <paulmck@...nel.org>,
 "Gautham R. Shenoy" <gautham.shenoy@....com>,
 Florian Weimer <fweimer@...hat.com>,
 Tim Chen <tim.c.chen@...el.com>,
 TCMalloc Team <tcmalloc-eng@...gle.com>
Subject: [patch 11/19] sched/mmcid: Move initialization out of line

It's getting bigger soon, so just move it out of line to the rest of the
code.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/mm_types.h |   15 +--------------
 kernel/sched/core.c      |   14 ++++++++++++++
 2 files changed, 15 insertions(+), 14 deletions(-)

--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1305,20 +1305,7 @@ static inline unsigned long *mm_cidmask(
 	return (unsigned long *)cid_bitmap;
 }

-static inline void mm_init_cid(struct mm_struct *mm, struct task_struct *p)
-{
-	int i;
-
-	for_each_possible_cpu(i) {
-		struct mm_cid_pcpu *pcpu = per_cpu_ptr(mm->mm_cid.pcpu, i);
-
-		pcpu->cid = MM_CID_UNSET;
-	}
-	mm->mm_cid.nr_cpus_allowed = p->nr_cpus_allowed;
-	raw_spin_lock_init(&mm->mm_cid.lock);
-	cpumask_copy(mm_cpus_allowed(mm), &p->cpus_mask);
-	bitmap_zero(mm_cidmask(mm), nr_cpu_ids);
-}
+void mm_init_cid(struct mm_struct *mm, struct task_struct *p);

 static inline int mm_alloc_cid_noprof(struct mm_struct *mm, struct task_struct *p)
 {
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -10466,6 +10466,20 @@ void sched_mm_cid_fork(struct task_struc
 	WARN_ON_ONCE(!t->mm || t->mm_cid.cid != MM_CID_UNSET);
 	t->mm_cid.active = 1;
 }
+
+void mm_init_cid(struct mm_struct *mm, struct task_struct *p)
+{
+	struct mm_cid_pcpu __percpu *pcpu = mm->mm_cid.pcpu;
+	int cpu;
+
+	for_each_possible_cpu(cpu)
+		per_cpu_ptr(pcpu, cpu)->cid = MM_CID_UNSET;
+
+	mm->mm_cid.nr_cpus_allowed = p->nr_cpus_allowed;
+	raw_spin_lock_init(&mm->mm_cid.lock);
+	cpumask_copy(mm_cpus_allowed(mm), &p->cpus_mask);
+	bitmap_zero(mm_cidmask(mm), nr_cpu_ids);
+}
 #else /* CONFIG_SCHED_MM_CID */
 static inline void mm_update_cpus_allowed(struct mm_struct *mm, const struct cpumask *affmsk) { }
 #endif /* !CONFIG_SCHED_MM_CID */