sched/core: Relocate tg_get_cfs_*() and cpu_cfs_*_read_*()

Collect the getters, relocate the trivial interface file wrappers, and put
all of them in period, quota, burst order to prepare for future changes.
Pure reordering. No functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250614012346.2358261-3-tj@kernel.org

Author: htejun

kernel/sched/core.c

@@ -9404,20 +9404,14 @@ static int tg_set_cfs_bandwidth(struct task_group *tg, u64 period, u64 quota,
 	return 0;
 }
 
-static int tg_set_cfs_quota(struct task_group *tg, long cfs_quota_us)
+static long tg_get_cfs_period(struct task_group *tg)
 {
-	u64 quota, period, burst;
+	u64 cfs_period_us;
 
-	period = ktime_to_ns(tg->cfs_bandwidth.period);
-	burst = tg->cfs_bandwidth.burst;
-	if (cfs_quota_us < 0)
-		quota = RUNTIME_INF;
-	else if ((u64)cfs_quota_us <= U64_MAX / NSEC_PER_USEC)
-		quota = (u64)cfs_quota_us * NSEC_PER_USEC;
-	else
-		return -EINVAL;
+	cfs_period_us = ktime_to_ns(tg->cfs_bandwidth.period);
+	do_div(cfs_period_us, NSEC_PER_USEC);
 
-	return tg_set_cfs_bandwidth(tg, period, quota, burst);
+	return cfs_period_us;
 }
 
 static long tg_get_cfs_quota(struct task_group *tg)
@@ -9433,6 +9427,16 @@ static long tg_get_cfs_quota(struct task_group *tg)
 	return quota_us;
 }
 
+static long tg_get_cfs_burst(struct task_group *tg)
+{
+	u64 burst_us;
+
+	burst_us = tg->cfs_bandwidth.burst;
+	do_div(burst_us, NSEC_PER_USEC);
+
+	return burst_us;
+}
+
 static int tg_set_cfs_period(struct task_group *tg, long cfs_period_us)
 {
 	u64 quota, period, burst;
@@ -9447,14 +9451,20 @@ static int tg_set_cfs_period(struct task_group *tg, long cfs_period_us)
 	return tg_set_cfs_bandwidth(tg, period, quota, burst);
 }
 
-static long tg_get_cfs_period(struct task_group *tg)
+static int tg_set_cfs_quota(struct task_group *tg, long cfs_quota_us)
 {
-	u64 cfs_period_us;
+	u64 quota, period, burst;
 
-	cfs_period_us = ktime_to_ns(tg->cfs_bandwidth.period);
-	do_div(cfs_period_us, NSEC_PER_USEC);
+	period = ktime_to_ns(tg->cfs_bandwidth.period);
+	burst = tg->cfs_bandwidth.burst;
+	if (cfs_quota_us < 0)
+		quota = RUNTIME_INF;
+	else if ((u64)cfs_quota_us <= U64_MAX / NSEC_PER_USEC)
+		quota = (u64)cfs_quota_us * NSEC_PER_USEC;
+	else
+		return -EINVAL;
 
-	return cfs_period_us;
+	return tg_set_cfs_bandwidth(tg, period, quota, burst);
 }
 
 static int tg_set_cfs_burst(struct task_group *tg, long cfs_burst_us)
@@ -9471,52 +9481,6 @@ static int tg_set_cfs_burst(struct task_group *tg, long cfs_burst_us)
 	return tg_set_cfs_bandwidth(tg, period, quota, burst);
 }
 
-static long tg_get_cfs_burst(struct task_group *tg)
-{
-	u64 burst_us;
-
-	burst_us = tg->cfs_bandwidth.burst;
-	do_div(burst_us, NSEC_PER_USEC);
-
-	return burst_us;
-}
-
-static s64 cpu_cfs_quota_read_s64(struct cgroup_subsys_state *css,
-				  struct cftype *cft)
-{
-	return tg_get_cfs_quota(css_tg(css));
-}
-
-static int cpu_cfs_quota_write_s64(struct cgroup_subsys_state *css,
-				   struct cftype *cftype, s64 cfs_quota_us)
-{
-	return tg_set_cfs_quota(css_tg(css), cfs_quota_us);
-}
-
-static u64 cpu_cfs_period_read_u64(struct cgroup_subsys_state *css,
-				   struct cftype *cft)
-{
-	return tg_get_cfs_period(css_tg(css));
-}
-
-static int cpu_cfs_period_write_u64(struct cgroup_subsys_state *css,
-				    struct cftype *cftype, u64 cfs_period_us)
-{
-	return tg_set_cfs_period(css_tg(css), cfs_period_us);
-}
-
-static u64 cpu_cfs_burst_read_u64(struct cgroup_subsys_state *css,
-				  struct cftype *cft)
-{
-	return tg_get_cfs_burst(css_tg(css));
-}
-
-static int cpu_cfs_burst_write_u64(struct cgroup_subsys_state *css,
-				   struct cftype *cftype, u64 cfs_burst_us)
-{
-	return tg_set_cfs_burst(css_tg(css), cfs_burst_us);
-}
-
 struct cfs_schedulable_data {
 	struct task_group *tg;
 	u64 period, quota;
@@ -9649,6 +9613,42 @@ static int cpu_cfs_local_stat_show(struct seq_file *sf, void *v)
 
 	return 0;
 }
+
+static u64 cpu_cfs_period_read_u64(struct cgroup_subsys_state *css,
+				   struct cftype *cft)
+{
+	return tg_get_cfs_period(css_tg(css));
+}
+
+static s64 cpu_cfs_quota_read_s64(struct cgroup_subsys_state *css,
+				  struct cftype *cft)
+{
+	return tg_get_cfs_quota(css_tg(css));
+}
+
+static u64 cpu_cfs_burst_read_u64(struct cgroup_subsys_state *css,
+				  struct cftype *cft)
+{
+	return tg_get_cfs_burst(css_tg(css));
+}
+
+static int cpu_cfs_period_write_u64(struct cgroup_subsys_state *css,
+				    struct cftype *cftype, u64 cfs_period_us)
+{
+	return tg_set_cfs_period(css_tg(css), cfs_period_us);
+}
+
+static int cpu_cfs_quota_write_s64(struct cgroup_subsys_state *css,
+				   struct cftype *cftype, s64 cfs_quota_us)
+{
+	return tg_set_cfs_quota(css_tg(css), cfs_quota_us);
+}
+
+static int cpu_cfs_burst_write_u64(struct cgroup_subsys_state *css,
+				   struct cftype *cftype, u64 cfs_burst_us)
+{
+	return tg_set_cfs_burst(css_tg(css), cfs_burst_us);
+}
 #endif /* CONFIG_CFS_BANDWIDTH */
 
 #ifdef CONFIG_RT_GROUP_SCHED
@@ -9710,16 +9710,16 @@ static struct cftype cpu_legacy_files[] = {
 	},
 #endif
 #ifdef CONFIG_CFS_BANDWIDTH
-	{
-		.name = "cfs_quota_us",
-		.read_s64 = cpu_cfs_quota_read_s64,
-		.write_s64 = cpu_cfs_quota_write_s64,
-	},
 	{
 		.name = "cfs_period_us",
 		.read_u64 = cpu_cfs_period_read_u64,
 		.write_u64 = cpu_cfs_period_write_u64,
 	},
+	{
+		.name = "cfs_quota_us",
+		.read_s64 = cpu_cfs_quota_read_s64,
+		.write_s64 = cpu_cfs_quota_write_s64,
+	},
 	{
 		.name = "cfs_burst_us",
 		.read_u64 = cpu_cfs_burst_read_u64,