rcu: Renamings to increase RCU clarity

Make RCU-sched, RCU-bh, and RCU-preempt be underlying
implementations, with "RCU" defined in terms of one of the
three.  Update the outdated rcu_qsctr_inc() names, as these
functions no longer increment anything.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josht@linux.vnet.ibm.com
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
LKML-Reference: <12509746132696-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 23 insertions, 10 deletions

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 3c89d6a2591f..e920f0fd59d8 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -157,17 +157,28 @@ extern int rcu_scheduler_active;
  * - call_rcu_sched() and rcu_barrier_sched()
  * on the write-side to insure proper synchronization.
  */
-#define rcu_read_lock_sched() preempt_disable()
-#define rcu_read_lock_sched_notrace() preempt_disable_notrace()
+static inline void rcu_read_lock_sched(void)
+{
+        preempt_disable();
+}
+static inline void rcu_read_lock_sched_notrace(void)
+{
+        preempt_disable_notrace();
+}
 
 /*
  * rcu_read_unlock_sched - marks the end of a RCU-classic critical section
  *
  * See rcu_read_lock_sched for more information.
  */
-#define rcu_read_unlock_sched() preempt_enable()
-#define rcu_read_unlock_sched_notrace() preempt_enable_notrace()
-
+static inline void rcu_read_unlock_sched(void)
+{
+        preempt_enable();
+}
+static inline void rcu_read_unlock_sched_notrace(void)
+{
+        preempt_enable_notrace();
+}
 
 
 /**
diff --git a/include/linux/rcupreempt.h b/include/linux/rcupreempt.h
index f164ac9b7807..2963f080e48d 100644
--- a/include/linux/rcupreempt.h
+++ b/include/linux/rcupreempt.h
@@ -40,8 +40,8 @@
 #include <linux/cpumask.h>
 #include <linux/seqlock.h>
 
-extern void rcu_qsctr_inc(int cpu);
-static inline void rcu_bh_qsctr_inc(int cpu) { }
+extern void rcu_sched_qs(int cpu);
+static inline void rcu_bh_qs(int cpu) { }
 
 /*
  * Someone might want to pass call_rcu_bh as a function pointer.
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index e37d5e2a8353..a0852d0d915b 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -30,8 +30,8 @@
 #ifndef __LINUX_RCUTREE_H
 #define __LINUX_RCUTREE_H
 
-extern void rcu_qsctr_inc(int cpu);
-extern void rcu_bh_qsctr_inc(int cpu);
+extern void rcu_sched_qs(int cpu);
+extern void rcu_bh_qs(int cpu);
 
 extern int rcu_pending(int cpu);
 extern int rcu_needs_cpu(int cpu);
@@ -73,7 +73,8 @@ static inline void __rcu_read_unlock_bh(void)
 
 #define __synchronize_sched() synchronize_rcu()
 
-#define call_rcu_sched(head, func) call_rcu(head, func)
+extern void call_rcu_sched(struct rcu_head *head,
+                           void (*func)(struct rcu_head *rcu));
 
 static inline void synchronize_rcu_expedited(void)
 {
@@ -91,6 +92,7 @@ extern void rcu_restart_cpu(int cpu);
 
 extern long rcu_batches_completed(void);
 extern long rcu_batches_completed_bh(void);
+extern long rcu_batches_completed_sched(void);
 
 static inline void rcu_init_sched(void)
 {