linux-kernel - [PATCH 8/8] sched: Move energy

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Date:   Tue, 15 Feb 2022 13:22:14 +0800
From:   Zhen Ni <nizhen@...ontech.com>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, mcgrof@...nel.org,
        keescook@...omium.org
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Zhen Ni <nizhen@...ontech.com>
Subject: [PATCH 8/8] sched: Move energy_aware sysctls to topology.c

move energy_aware sysctls to topology.c and use the new
register_sysctl_init() to register the sysctl interface.

Signed-off-by: Zhen Ni <nizhen@...ontech.com>
---
 include/linux/sched/sysctl.h |  6 ------
 kernel/sched/topology.c      | 25 +++++++++++++++++++++++--
 kernel/sysctl.c              | 11 -----------
 3 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index 053688eafd51..b6a4063e388d 100644
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -24,10 +24,4 @@ enum sched_tunable_scaling {
 int sysctl_numa_balancing(struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos);
 
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
-extern unsigned int sysctl_sched_energy_aware;
-int sched_energy_aware_handler(struct ctl_table *table, int write,
-		void *buffer, size_t *lenp, loff_t *ppos);
-#endif
-
 #endif /* _LINUX_SCHED_SYSCTL_H */
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index d201a7052a29..409e27af2034 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -207,7 +207,7 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain *parent)
 
 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
 DEFINE_STATIC_KEY_FALSE(sched_energy_present);
-unsigned int sysctl_sched_energy_aware = 1;
+static unsigned int sysctl_sched_energy_aware = 1;
 DEFINE_MUTEX(sched_energy_mutex);
 bool sched_energy_update;
 
@@ -221,7 +221,7 @@ void rebuild_sched_domains_energy(void)
 }
 
 #ifdef CONFIG_PROC_SYSCTL
-int sched_energy_aware_handler(struct ctl_table *table, int write,
+static int sched_energy_aware_handler(struct ctl_table *table, int write,
 		void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret, state;
@@ -238,6 +238,27 @@ int sched_energy_aware_handler(struct ctl_table *table, int write,
 
 	return ret;
 }
+
+static struct ctl_table sched_energy_aware_sysctls[] = {
+	{
+		.procname       = "sched_energy_aware",
+		.data           = &sysctl_sched_energy_aware,
+		.maxlen         = sizeof(unsigned int),
+		.mode           = 0644,
+		.proc_handler   = sched_energy_aware_handler,
+		.extra1         = SYSCTL_ZERO,
+		.extra2         = SYSCTL_ONE,
+	},
+	{}
+};
+
+static int __init sched_energy_aware_sysctl_init(void)
+{
+	register_sysctl_init("kernel", sched_energy_aware_sysctls);
+	return 0;
+}
+
+late_initcall(sched_energy_aware_sysctl_init);
 #endif
 
 static void free_pd(struct perf_domain *pd)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 21b797906cc4..ee6701ea73ea 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1674,17 +1674,6 @@ static struct ctl_table kern_table[] = {
 		.extra2		= SYSCTL_ONE,
 	},
 #endif /* CONFIG_NUMA_BALANCING */
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
-	{
-		.procname	= "sched_energy_aware",
-		.data		= &sysctl_sched_energy_aware,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= sched_energy_aware_handler,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_ONE,
-	},
-#endif
 #ifdef CONFIG_PROVE_LOCKING
 	{
 		.procname	= "prove_locking",
-- 
2.20.1