rcu: Eliminate unneeded function wrapping

The functions rcu_init() is a wrapper for __rcu_init(), and also
sets up the CPU-hotplug notifier for rcu_barrier_cpu_hotplug().
But TINY_RCU doesn't need CPU-hotplug notification, and the
rcu_barrier_cpu_hotplug() is a simple wrapper for
rcu_cpu_notify().

So push rcu_init() out to kernel/rcutree.c and kernel/rcutiny.c
and get rid of the wrapper function rcu_barrier_cpu_hotplug().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <12589088302320-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 0 insertions, 5 deletions

diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 2c1fe8373e71..a3b6272af2dd 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -38,7 +38,6 @@ void rcu_bh_qs(int cpu);
 
 #define rcu_init_sched()        do { } while (0)
 extern void rcu_check_callbacks(int cpu, int user);
-extern void __rcu_init(void);
 
 /*
  * Return the number of grace periods.
@@ -69,7 +68,6 @@ static inline void synchronize_rcu_bh_expedited(void)
 }
 
 struct notifier_block;
-extern int rcu_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu);
 
 #ifdef CONFIG_NO_HZ
 
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 9642c6bcb399..111a65257350 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -34,8 +34,6 @@ struct notifier_block;
 
 extern void rcu_sched_qs(int cpu);
 extern void rcu_bh_qs(int cpu);
-extern int rcu_cpu_notify(struct notifier_block *self,
-                          unsigned long action, void *hcpu);
 extern int rcu_needs_cpu(int cpu);
 extern int rcu_expedited_torture_stats(char *page);
 
@@ -83,7 +81,6 @@ static inline void synchronize_rcu_bh_expedited(void)
         synchronize_sched_expedited();
 }
 
-extern void __rcu_init(void);
 extern void rcu_check_callbacks(int cpu, int user);
 
 extern long rcu_batches_completed(void);