You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
2.7 KiB
86 lines
2.7 KiB
/*
|
|
* Read-Copy Update mechanism for mutual exclusion (RT implementation)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) IBM Corporation, 2006
|
|
*
|
|
* Author: Paul McKenney <paulmck@us.ibm.com>
|
|
*
|
|
* Based on the original work by Paul McKenney <paul.mckenney@us.ibm.com>
|
|
* and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen.
|
|
* Papers:
|
|
* http://www.rdrop.com/users/paulmck/paper/rclockpdcsproof.pdf
|
|
* http://lse.sourceforge.net/locking/rclock_OLS.2001.05.01c.sc.pdf (OLS2001)
|
|
*
|
|
* For detailed explanation of Read-Copy Update mechanism see -
|
|
* Documentation/RCU
|
|
*
|
|
*/
|
|
|
|
#ifndef __LINUX_RCUPREEMPT_H
|
|
#define __LINUX_RCUPREEMPT_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/cache.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/seqlock.h>
|
|
|
|
#define rcu_qsctr_inc(cpu)
|
|
#define rcu_bh_qsctr_inc(cpu)
|
|
#define call_rcu_bh(head, rcu) call_rcu(head, rcu)
|
|
|
|
extern void __rcu_read_lock(void) __acquires(RCU);
|
|
extern void __rcu_read_unlock(void) __releases(RCU);
|
|
extern int rcu_pending(int cpu);
|
|
extern int rcu_needs_cpu(int cpu);
|
|
|
|
#define __rcu_read_lock_bh() { rcu_read_lock(); local_bh_disable(); }
|
|
#define __rcu_read_unlock_bh() { local_bh_enable(); rcu_read_unlock(); }
|
|
|
|
extern void __synchronize_sched(void);
|
|
|
|
extern void __rcu_init(void);
|
|
extern void rcu_check_callbacks(int cpu, int user);
|
|
extern void rcu_restart_cpu(int cpu);
|
|
extern long rcu_batches_completed(void);
|
|
|
|
/*
|
|
* Return the number of RCU batches processed thus far. Useful for debug
|
|
* and statistic. The _bh variant is identifcal to straight RCU
|
|
*/
|
|
static inline long rcu_batches_completed_bh(void)
|
|
{
|
|
return rcu_batches_completed();
|
|
}
|
|
|
|
#ifdef CONFIG_RCU_TRACE
|
|
struct rcupreempt_trace;
|
|
extern long *rcupreempt_flipctr(int cpu);
|
|
extern long rcupreempt_data_completed(void);
|
|
extern int rcupreempt_flip_flag(int cpu);
|
|
extern int rcupreempt_mb_flag(int cpu);
|
|
extern char *rcupreempt_try_flip_state_name(void);
|
|
extern struct rcupreempt_trace *rcupreempt_trace_cpu(int cpu);
|
|
#endif
|
|
|
|
struct softirq_action;
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __LINUX_RCUPREEMPT_H */
|
|
|