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rcu: Renamings to increase RCU clarity

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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  Update the outdated rcu_qsctr_inc() names, as these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>
This commit is contained in:
Paul E. McKenney 2009-08-22 13:56:46 -07:00 • committed by Ingo Molnar
commit d6714c22b4
10 changed files with 95 additions and 63 deletions
Download patch file Download diff file Expand all files Collapse all files

21
include/linux/rcupdate.h
View file

@ -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();
}
/**

4
include/linux/rcupreempt.h
View file

@ -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.

8
include/linux/rcutree.h
View file

@ -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)
{