[RFC PATCH v6 06/25] sched/rt: Move functions from rt.c to sched.h

[Yuri Andriaccio <yurand2000@gmail.com>]

From: luca abeni <luca.abeni@santannapisa.it>

Make the following functions/macros be non-static and move them in
sched.h, so that they can be also used in other source files:

- rt_entity_is_task()
- rt_task_of()
- rq_of_rt_rq()
- rt_rq_of_se()
- rq_of_rt_se()

There are no functional changes, apart from the use of container_of_const()
instead of container_of() where applicable. This is needed by future patches.

Signed-off-by: luca abeni <luca.abeni@santannapisa.it>
Signed-off-by: Yuri Andriaccio <yurand2000@gmail.com>
---
 kernel/sched/rt.c    | 56 ------------------------------------------
 kernel/sched/sched.h | 58 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 56 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 0f0d9c283bd4..fe5b58f8fc69 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -166,36 +166,6 @@ static void destroy_rt_bandwidth(struct rt_bandwidth *rt_b)
 	hrtimer_cancel(&rt_b->rt_period_timer);
 }
 
-#define rt_entity_is_task(rt_se) (!(rt_se)->my_q)
-
-static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
-{
-	WARN_ON_ONCE(!rt_entity_is_task(rt_se));
-
-	return container_of(rt_se, struct task_struct, rt);
-}
-
-static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
-{
-	/* Cannot fold with non-CONFIG_RT_GROUP_SCHED version, layout */
-	WARN_ON(!rt_group_sched_enabled() && rt_rq->tg != &root_task_group);
-	return rt_rq->rq;
-}
-
-static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
-{
-	WARN_ON(!rt_group_sched_enabled() && rt_se->rt_rq->tg != &root_task_group);
-	return rt_se->rt_rq;
-}
-
-static inline struct rq *rq_of_rt_se(struct sched_rt_entity *rt_se)
-{
-	struct rt_rq *rt_rq = rt_se->rt_rq;
-
-	WARN_ON(!rt_group_sched_enabled() && rt_rq->tg != &root_task_group);
-	return rt_rq->rq;
-}
-
 void unregister_rt_sched_group(struct task_group *tg)
 {
 	if (!rt_group_sched_enabled())
@@ -294,32 +264,6 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 
 #else /* !CONFIG_RT_GROUP_SCHED: */
 
-#define rt_entity_is_task(rt_se) (1)
-
-static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
-{
-	return container_of(rt_se, struct task_struct, rt);
-}
-
-static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
-{
-	return container_of(rt_rq, struct rq, rt);
-}
-
-static inline struct rq *rq_of_rt_se(struct sched_rt_entity *rt_se)
-{
-	struct task_struct *p = rt_task_of(rt_se);
-
-	return task_rq(p);
-}
-
-static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
-{
-	struct rq *rq = rq_of_rt_se(rt_se);
-
-	return &rq->rt;
-}
-
 void unregister_rt_sched_group(struct task_group *tg) { }
 
 void free_rt_sched_group(struct task_group *tg) { }
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 970386ce4dbf..a03866f68a3b 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -3332,6 +3332,64 @@ extern void set_rq_offline(struct rq *rq);
 
 extern bool sched_smp_initialized;
 
+#ifdef CONFIG_RT_GROUP_SCHED
+#define rt_entity_is_task(rt_se) (!(rt_se)->my_q)
+
+static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
+{
+	WARN_ON_ONCE(!rt_entity_is_task(rt_se));
+
+	return container_of_const(rt_se, struct task_struct, rt);
+}
+
+static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
+{
+	/* Cannot fold with non-CONFIG_RT_GROUP_SCHED version, layout */
+	WARN_ON(!rt_group_sched_enabled() && rt_rq->tg != &root_task_group);
+	return rt_rq->rq;
+}
+
+static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
+{
+	WARN_ON(!rt_group_sched_enabled() && rt_se->rt_rq->tg != &root_task_group);
+	return rt_se->rt_rq;
+}
+
+static inline struct rq *rq_of_rt_se(struct sched_rt_entity *rt_se)
+{
+	struct rt_rq *rt_rq = rt_se->rt_rq;
+
+	WARN_ON(!rt_group_sched_enabled() && rt_rq->tg != &root_task_group);
+	return rt_rq->rq;
+}
+#else
+#define rt_entity_is_task(rt_se) (1)
+
+static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
+{
+	return container_of_const(rt_se, struct task_struct, rt);
+}
+
+static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
+{
+	return container_of_const(rt_rq, struct rq, rt);
+}
+
+static inline struct rq *rq_of_rt_se(struct sched_rt_entity *rt_se)
+{
+	struct task_struct *p = rt_task_of(rt_se);
+
+	return task_rq(p);
+}
+
+static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
+{
+	struct rq *rq = rq_of_rt_se(rt_se);
+
+	return &rq->rt;
+}
+#endif
+
 DEFINE_LOCK_GUARD_2(double_rq_lock, struct rq,
 		    double_rq_lock(_T->lock, _T->lock2),
 		    double_rq_unlock(_T->lock, _T->lock2))
-- 
2.54.0