| /* |
| * 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 */ |