rcu: Remove now-unused rcutorture APIs

This commit removesrcu_sched_get_gp_seq(), rcu_bh_get_gp_seq(),
rcu_exp_batches_completed_sched(), rcu_sched_force_quiescent_state(),
and rcu_bh_force_quiescent_state(), which are no longer used because
rcutorture no longer does "rcu_bh" and "rcu_sched" torture types.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/rcu.h

diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 889c0a7..587c5ad 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -510,29 +510,19 @@ void srcutorture_get_gp_data(enum rcutorture_type test_type,
 
 #ifdef CONFIG_TINY_RCU
 static inline unsigned long rcu_get_gp_seq(void) { return 0; }
-static inline unsigned long rcu_bh_get_gp_seq(void) { return 0; }
-static inline unsigned long rcu_sched_get_gp_seq(void) { return 0; }
 static inline unsigned long rcu_exp_batches_completed(void) { return 0; }
-static inline unsigned long rcu_exp_batches_completed_sched(void) { return 0; }
 static inline unsigned long
 srcu_batches_completed(struct srcu_struct *sp) { return 0; }
 static inline void rcu_force_quiescent_state(void) { }
-static inline void rcu_bh_force_quiescent_state(void) { }
-static inline void rcu_sched_force_quiescent_state(void) { }
 static inline void show_rcu_gp_kthreads(void) { }
 static inline int rcu_get_gp_kthreads_prio(void) { return 0; }
 #else /* #ifdef CONFIG_TINY_RCU */
 unsigned long rcu_get_gp_seq(void);
-unsigned long rcu_bh_get_gp_seq(void);
-unsigned long rcu_sched_get_gp_seq(void);
 unsigned long rcu_exp_batches_completed(void);
-unsigned long rcu_exp_batches_completed_sched(void);
 unsigned long srcu_batches_completed(struct srcu_struct *sp);
 void show_rcu_gp_kthreads(void);
 int rcu_get_gp_kthreads_prio(void);
 void rcu_force_quiescent_state(void);
-void rcu_bh_force_quiescent_state(void);
-void rcu_sched_force_quiescent_state(void);
 extern struct workqueue_struct *rcu_gp_wq;
 extern struct workqueue_struct *rcu_par_gp_wq;
 #endif /* #else #ifdef CONFIG_TINY_RCU */

kernel/rcu/tree.c

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index bf14228..58e295e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -477,25 +477,6 @@ unsigned long rcu_get_gp_seq(void)
 EXPORT_SYMBOL_GPL(rcu_get_gp_seq);
 
 /*
- * Return the number of RCU-sched GPs completed thus far for debug & stats.
- */
-unsigned long rcu_sched_get_gp_seq(void)
-{
-	return rcu_get_gp_seq();
-}
-EXPORT_SYMBOL_GPL(rcu_sched_get_gp_seq);
-
-/*
- * Return the number of RCU GPs completed thus far for debug & stats.
- * This is a transitional API and will soon be removed.
- */
-unsigned long rcu_bh_get_gp_seq(void)
-{
-	return READ_ONCE(rcu_state.gp_seq);
-}
-EXPORT_SYMBOL_GPL(rcu_bh_get_gp_seq);
-
-/*
  * Return the number of RCU expedited batches completed thus far for
  * debug & stats.  Odd numbers mean that a batch is in progress, even
  * numbers mean idle.  The value returned will thus be roughly double
@@ -508,16 +489,6 @@ unsigned long rcu_exp_batches_completed(void)
 EXPORT_SYMBOL_GPL(rcu_exp_batches_completed);
 
 /*
- * Return the number of RCU-sched expedited batches completed thus far
- * for debug & stats.  Similar to rcu_exp_batches_completed().
- */
-unsigned long rcu_exp_batches_completed_sched(void)
-{
-	return rcu_state.expedited_sequence;
-}
-EXPORT_SYMBOL_GPL(rcu_exp_batches_completed_sched);
-
-/*
  * Force a quiescent state.
  */
 void rcu_force_quiescent_state(void)
@@ -527,24 +498,6 @@ void rcu_force_quiescent_state(void)
 EXPORT_SYMBOL_GPL(rcu_force_quiescent_state);
 
 /*
- * Force a quiescent state for RCU BH.
- */
-void rcu_bh_force_quiescent_state(void)
-{
-	force_quiescent_state();
-}
-EXPORT_SYMBOL_GPL(rcu_bh_force_quiescent_state);
-
-/*
- * Force a quiescent state for RCU-sched.
- */
-void rcu_sched_force_quiescent_state(void)
-{
-	rcu_force_quiescent_state();
-}
-EXPORT_SYMBOL_GPL(rcu_sched_force_quiescent_state);
-
-/*
  * Show the state of the grace-period kthreads.
  */
 void show_rcu_gp_kthreads(void)