sched: Move rr_timeslice sysctls to rt.c

move rr_timeslice sysctls to rt.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>

include/linux/sched/sysctl.h

@@ -41,11 +41,6 @@ extern unsigned int sysctl_sched_uclamp_util_min_rt_default;
 extern unsigned int sysctl_sched_cfs_bandwidth_slice;
 #endif
 
-extern int sysctl_sched_rr_timeslice;
-extern int sched_rr_timeslice;
-
-int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
-		size_t *lenp, loff_t *ppos);
 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,

kernel/sched/rt.c

@@ -5,7 +5,7 @@
  */
 
 int sched_rr_timeslice = RR_TIMESLICE;
-int sysctl_sched_rr_timeslice = (MSEC_PER_SEC / HZ) * RR_TIMESLICE;
+static int sysctl_sched_rr_timeslice = (MSEC_PER_SEC / HZ) * RR_TIMESLICE;
 /* More than 4 hours if BW_SHIFT equals 20. */
 static const u64 max_rt_runtime = MAX_BW;
 
@@ -27,6 +27,8 @@ int sysctl_sched_rt_runtime = 950000;
 
 static int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos);
+static int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
+		size_t *lenp, loff_t *ppos);
 #ifdef CONFIG_SYSCTL
 static struct ctl_table sched_rt_sysctls[] = {
 	{
@@ -43,6 +45,13 @@ static struct ctl_table sched_rt_sysctls[] = {
 		.mode           = 0644,
 		.proc_handler   = sched_rt_handler,
 	},
+	{
+		.procname       = "sched_rr_timeslice_ms",
+		.data           = &sysctl_sched_rr_timeslice,
+		.maxlen         = sizeof(int),
+		.mode           = 0644,
+		.proc_handler   = sched_rr_handler,
+	},
 	{}
 };
 
@@ -3005,7 +3014,7 @@ static int sched_rt_handler(struct ctl_table *table, int write, void *buffer,
 	return ret;
 }
 
-int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
+static int sched_rr_handler(struct ctl_table *table, int write, void *buffer,
 		size_t *lenp, loff_t *ppos)
 {
 	int ret;

kernel/sched/sched.h

@@ -117,6 +117,7 @@ extern void call_trace_sched_update_nr_running(struct rq *rq, int count);
 
 extern unsigned int sysctl_sched_rt_period;
 extern int sysctl_sched_rt_runtime;
+extern int sched_rr_timeslice;
 
 /*
  * Helpers for converting nanosecond timing to jiffy resolution

kernel/sysctl.c

@@ -1681,13 +1681,6 @@ static struct ctl_table kern_table[] = {
 		.extra2		= SYSCTL_FOUR,
 	},
 #endif /* CONFIG_NUMA_BALANCING */
-	{
-		.procname	= "sched_rr_timeslice_ms",
-		.data		= &sysctl_sched_rr_timeslice,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= sched_rr_handler,
-	},
 #ifdef CONFIG_UCLAMP_TASK
 	{
 		.procname	= "sched_util_clamp_min",