rcu: Consolidate RCU-sched update-side function definitions

This commit saves a few lines by consolidating the RCU-sched function
definitions at the end of include/linux/rcupdate.h.  This consolidation
also makes it easier to remove them all when the time comes.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

include/linux/rcupdate.h

@@ -48,12 +48,6 @@
 #define ulong2long(a)		(*(long *)(&(a)))
 
 /* Exported common interfaces */
-
-#ifndef CONFIG_TINY_RCU
-void synchronize_sched(void);
-void call_rcu_sched(struct rcu_head *head, rcu_callback_t func);
-#endif
-
 void call_rcu(struct rcu_head *head, rcu_callback_t func);
 void rcu_barrier_tasks(void);
 void synchronize_rcu(void);
@@ -170,7 +164,7 @@ void exit_tasks_rcu_finish(void);
 #define rcu_tasks_qs(t)	do { } while (0)
 #define rcu_note_voluntary_context_switch(t)		rcu_all_qs()
 #define call_rcu_tasks call_rcu_sched
-#define synchronize_rcu_tasks synchronize_sched
+#define synchronize_rcu_tasks synchronize_rcu
 static inline void exit_tasks_rcu_start(void) { }
 static inline void exit_tasks_rcu_finish(void) { }
 #endif /* #else #ifdef CONFIG_TASKS_RCU */
@@ -892,4 +886,34 @@ static inline void rcu_barrier_bh(void)
 	rcu_barrier();
 }
 
+static inline void synchronize_sched(void)
+{
+	synchronize_rcu();
+}
+
+static inline void synchronize_sched_expedited(void)
+{
+	synchronize_rcu_expedited();
+}
+
+static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
+{
+	call_rcu(head, func);
+}
+
+static inline void rcu_barrier_sched(void)
+{
+	rcu_barrier();
+}
+
+static inline unsigned long get_state_synchronize_sched(void)
+{
+	return get_state_synchronize_rcu();
+}
+
+static inline void cond_synchronize_sched(unsigned long oldstate)
+{
+	cond_synchronize_rcu(oldstate);
+}
+
 #endif /* __LINUX_RCUPDATE_H */

include/linux/rcutiny.h

@@ -36,11 +36,6 @@ static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp)
 /* Never flag non-existent other CPUs! */
 static inline bool rcu_eqs_special_set(int cpu) { return false; }
 
-static inline void synchronize_sched(void)
-{
-	synchronize_rcu();
-}
-
 static inline unsigned long get_state_synchronize_rcu(void)
 {
 	return 0;
@@ -51,36 +46,11 @@ static inline void cond_synchronize_rcu(unsigned long oldstate)
 	might_sleep();
 }
 
-static inline unsigned long get_state_synchronize_sched(void)
-{
-	return 0;
-}
-
-static inline void cond_synchronize_sched(unsigned long oldstate)
-{
-	might_sleep();
-}
-
 extern void rcu_barrier(void);
 
-static inline void rcu_barrier_sched(void)
-{
-	rcu_barrier();  /* Only one CPU, so only one list of callbacks! */
-}
-
 static inline void synchronize_rcu_expedited(void)
 {
-	synchronize_sched();
-}
-
-static inline void synchronize_sched_expedited(void)
-{
-	synchronize_sched();
-}
-
-static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
-{
-	call_rcu(head, func);
+	synchronize_rcu();
 }
 
 static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)

include/linux/rcutree.h

@@ -46,21 +46,12 @@ static inline void rcu_virt_note_context_switch(int cpu)
 }
 
 void synchronize_rcu_expedited(void);
-
-static inline void synchronize_sched_expedited(void)
-{
-	synchronize_rcu_expedited();
-}
-
 void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
 
 void rcu_barrier(void);
-void rcu_barrier_sched(void);
 bool rcu_eqs_special_set(int cpu);
 unsigned long get_state_synchronize_rcu(void);
 void cond_synchronize_rcu(unsigned long oldstate);
-unsigned long get_state_synchronize_sched(void);
-void cond_synchronize_sched(unsigned long oldstate);
 
 void rcu_idle_enter(void);
 void rcu_idle_exit(void);

kernel/rcu/tree.c

@@ -2950,19 +2950,6 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func)
 }
 EXPORT_SYMBOL_GPL(call_rcu);
 
-/**
- * call_rcu_sched() - Queue an RCU for invocation after sched grace period.
- * @head: structure to be used for queueing the RCU updates.
- * @func: actual callback function to be invoked after the grace period
- *
- * This is transitional.
- */
-void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
-{
-	call_rcu(head, func);
-}
-EXPORT_SYMBOL_GPL(call_rcu_sched);
-
 /*
  * Queue an RCU callback for lazy invocation after a grace period.
  * This will likely be later named something like "call_rcu_lazy()",
@@ -2976,17 +2963,6 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
 }
 EXPORT_SYMBOL_GPL(kfree_call_rcu);
 
-/**
- * synchronize_sched - wait until an rcu-sched grace period has elapsed.
- *
- * This is transitional.
- */
-void synchronize_sched(void)
-{
-	synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(synchronize_sched);
-
 /**
  * get_state_synchronize_rcu - Snapshot current RCU state
  *
@@ -3028,29 +3004,6 @@ void cond_synchronize_rcu(unsigned long oldstate)
 }
 EXPORT_SYMBOL_GPL(cond_synchronize_rcu);
 
-/**
- * get_state_synchronize_sched - Snapshot current RCU-sched state
- *
- * This is transitional, and only used by rcutorture.
- */
-unsigned long get_state_synchronize_sched(void)
-{
-	return get_state_synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(get_state_synchronize_sched);
-
-/**
- * cond_synchronize_sched - Conditionally wait for an RCU-sched grace period
- * @oldstate: return value from earlier call to get_state_synchronize_sched()
- *
- * This is transitional and only used by rcutorture.
- */
-void cond_synchronize_sched(unsigned long oldstate)
-{
-	cond_synchronize_rcu(oldstate);
-}
-EXPORT_SYMBOL_GPL(cond_synchronize_sched);
-
 /*
  * Check to see if there is any immediate RCU-related work to be done by
  * the current CPU, for the specified type of RCU, returning 1 if so and
@@ -3266,17 +3219,6 @@ void rcu_barrier(void)
 }
 EXPORT_SYMBOL_GPL(rcu_barrier);
 
-/**
- * rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks.
- *
- * This is transitional.
- */
-void rcu_barrier_sched(void)
-{
-	rcu_barrier();
-}
-EXPORT_SYMBOL_GPL(rcu_barrier_sched);
-
 /*
  * Propagate ->qsinitmask bits up the rcu_node tree to account for the
  * first CPU in a given leaf rcu_node structure coming online.  The caller