linux-kernel - [PATCH 3/3] sched/rt: Cleanup global RT bandwidth functions

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Message-Id: <20260119-sched-rert_groups-v1-3-80c1e5269910@suse.com>
Date: Mon, 19 Jan 2026 18:41:21 +0100
From: Michal Koutný <mkoutny@...e.com>
To: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
 Juri Lelli <juri.lelli@...hat.com>, 
 Vincent Guittot <vincent.guittot@...aro.org>, 
 Dietmar Eggemann <dietmar.eggemann@....com>, 
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, 
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>
Cc: linux-kernel@...r.kernel.org, 
 Michal Koutný <mkoutny@...e.com>
Subject: [PATCH 3/3] sched/rt: Cleanup global RT bandwidth functions

The commit 5f6bd380c7bdb ("sched/rt: Remove default bandwidth control")
and followup changes made a few of the functions unnecessary, drop them
for simplicity.

Signed-off-by: Michal Koutný <mkoutny@...e.com>
---
 kernel/sched/rt.c | 24 ------------------------
 1 file changed, 24 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index c621e61568359..0031320d50703 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -2807,13 +2807,6 @@ long sched_group_rt_period(struct task_group *tg)
 	return rt_period_us;
 }
 
-#ifdef CONFIG_SYSCTL
-static int sched_rt_global_constraints(void)
-{
-	return 0;
-}
-#endif /* CONFIG_SYSCTL */
-
 int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk)
 {
 	/* Don't accept real-time tasks when there is no way for them to run */
@@ -2823,14 +2816,6 @@ int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk)
 	return 1;
 }
 
-#else /* !CONFIG_RT_GROUP_SCHED: */
-
-#ifdef CONFIG_SYSCTL
-static int sched_rt_global_constraints(void)
-{
-	return 0;
-}
-#endif /* CONFIG_SYSCTL */
 #endif /* !CONFIG_RT_GROUP_SCHED */
 
 #ifdef CONFIG_SYSCTL
@@ -2854,10 +2839,6 @@ static int sched_rt_global_validate(void)
 	return ret;
 }
 
-static void sched_rt_do_global(void)
-{
-}
-
 static int sched_rt_handler(const struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos)
 {
@@ -2881,11 +2862,6 @@ static int sched_rt_handler(const struct ctl_table *table, int write, void *buff
 		if (ret)
 			goto undo;
 
-		ret = sched_rt_global_constraints();
-		if (ret)
-			goto undo;
-
-		sched_rt_do_global();
 		sched_dl_do_global();
 	}
 	if (0) {

-- 
2.52.0