sched: Move schedstats sysctls to core.c

move schedstats sysctls to core.c and use the new
register_sysctl_init() to register the sysctl interface.

Signed-off-by: Zhen Ni <nizhen@uniontech.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

Author: nizhenth

include/linux/sched/sysctl.h

@@ -64,8 +64,6 @@ int sysctl_sched_uclamp_handler(struct ctl_table *table, int write,
 		void *buffer, size_t *lenp, loff_t *ppos);
 int sysctl_numa_balancing(struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos);
-int sysctl_schedstats(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;

kernel/sched/core.c

@@ -4430,7 +4430,7 @@ static int __init setup_schedstats(char *str)
 __setup("schedstats=", setup_schedstats);
 
 #ifdef CONFIG_PROC_SYSCTL
-int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
+static int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos)
 {
 	struct ctl_table t;
@@ -4449,6 +4449,26 @@ int sysctl_schedstats(struct ctl_table *table, int write, void *buffer,
 		set_schedstats(state);
 	return err;
 }
+
+static struct ctl_table sched_schedstats_sysctls[] = {
+	{
+		.procname       = "sched_schedstats",
+		.data           = NULL,
+		.maxlen         = sizeof(unsigned int),
+		.mode           = 0644,
+		.proc_handler   = sysctl_schedstats,
+		.extra1         = SYSCTL_ZERO,
+		.extra2         = SYSCTL_ONE,
+	},
+	{}
+};
+
+static int __init sched_schedstats_sysctl_init(void)
+{
+	register_sysctl_init("kernel", sched_schedstats_sysctls);
+	return 0;
+}
+late_initcall(sched_schedstats_sysctl_init);
 #endif /* CONFIG_PROC_SYSCTL */
 #endif /* CONFIG_SCHEDSTATS */
 

kernel/sysctl.c

@@ -1659,17 +1659,6 @@ int proc_do_static_key(struct ctl_table *table, int write,
 }
 
 static struct ctl_table kern_table[] = {
-#ifdef CONFIG_SCHEDSTATS
-	{
-		.procname	= "sched_schedstats",
-		.data		= NULL,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= sysctl_schedstats,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_ONE,
-	},
-#endif /* CONFIG_SCHEDSTATS */
 #ifdef CONFIG_TASK_DELAY_ACCT
 	{
 		.procname	= "task_delayacct",