sched: Move child_runs_first sysctls to fair.c

move child_runs_first sysctls to fair.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>

diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index c1076b5..1d2ff3c 100644 (file)
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -14,8 +14,6 @@ extern unsigned long sysctl_hung_task_timeout_secs;
 enum { sysctl_hung_task_timeout_secs = 0 };
 #endif
 
-extern unsigned int sysctl_sched_child_runs_first;
-
 enum sched_tunable_scaling {
        SCHED_TUNABLESCALING_NONE,
        SCHED_TUNABLESCALING_LOG,

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d4bd299..788b1d6 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -109,6 +109,25 @@ static unsigned int sched_nr_latency = 8;
  * parent will (try to) run first.
  */
 unsigned int sysctl_sched_child_runs_first __read_mostly;
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_child_runs_first_sysctls[] = {
+       {
+               .procname       = "sched_child_runs_first",
+               .data           = &sysctl_sched_child_runs_first,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec,
+       },
+       {}
+};
+
+static int __init sched_child_runs_first_sysctl_init(void)
+{
+       register_sysctl_init("kernel", sched_child_runs_first_sysctls);
+       return 0;
+}
+late_initcall(sched_child_runs_first_sysctl_init);
+#endif
 
 /*
  * SCHED_OTHER wake-up granularity.

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 58263f9..767fc1d 100644 (file)
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -108,6 +108,8 @@ extern __read_mostly int scheduler_running;
 extern unsigned long calc_load_update;
 extern atomic_long_t calc_load_tasks;
 
+extern unsigned int sysctl_sched_child_runs_first;
+
 extern void calc_global_load_tick(struct rq *this_rq);
 extern long calc_load_fold_active(struct rq *this_rq, long adjust);
 

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 830aaf8..6bbb8e1 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1659,13 +1659,6 @@ int proc_do_static_key(struct ctl_table *table, int write,
 }
 
 static struct ctl_table kern_table[] = {
-       {
-               .procname       = "sched_child_runs_first",
-               .data           = &sysctl_sched_child_runs_first,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec,
-       },
 #ifdef CONFIG_SCHEDSTATS
        {
                .procname       = "sched_schedstats",