rcu: Re-arrange code to reduce #ifdef pain

Remove #ifdefs from kernel/rcupdate.c and
include/linux/rcupdate.h by moving code to
include/linux/rcutiny.h, include/linux/rcutree.h, and
kernel/rcutree.c.

Also remove some definitions that are no longer used.

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: <1258908830885-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index a3b6272..c4ba9a7 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -39,6 +39,11 @@ void rcu_bh_qs(int cpu);
 #define rcu_init_sched()	do { } while (0)
 extern void rcu_check_callbacks(int cpu, int user);
 
+static inline int rcu_needs_cpu(int cpu)
+{
+	return 0;
+}
+
 /*
  * Return the number of grace periods.
  */
@@ -57,6 +62,8 @@ static inline long rcu_batches_completed_bh(void)
 
 extern int rcu_expedited_torture_stats(char *page);
 
+#define synchronize_rcu synchronize_sched
+
 static inline void synchronize_rcu_expedited(void)
 {
 	synchronize_sched();
@@ -86,6 +93,10 @@ static inline void rcu_exit_nohz(void)
 
 #endif /* #else #ifdef CONFIG_NO_HZ */
 
+static inline void rcu_scheduler_starting(void)
+{
+}
+
 static inline void exit_rcu(void)
 {
 }