100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
/*
|
|
* 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 the Preemptible Read-Copy Update mechanism see -
|
|
* http://lwn.net/Articles/253651/
|
|
*/
|
|
|
|
#ifndef __LINUX_RCUPREEMPT_TRACE_H
|
|
#define __LINUX_RCUPREEMPT_TRACE_H
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include <asm/atomic.h>
|
|
|
|
/*
|
|
* PREEMPT_RCU data structures.
|
|
*/
|
|
|
|
struct rcupreempt_trace {
|
|
long next_length;
|
|
long next_add;
|
|
long wait_length;
|
|
long wait_add;
|
|
long done_length;
|
|
long done_add;
|
|
long done_remove;
|
|
atomic_t done_invoked;
|
|
long rcu_check_callbacks;
|
|
atomic_t rcu_try_flip_1;
|
|
atomic_t rcu_try_flip_e1;
|
|
long rcu_try_flip_i1;
|
|
long rcu_try_flip_ie1;
|
|
long rcu_try_flip_g1;
|
|
long rcu_try_flip_a1;
|
|
long rcu_try_flip_ae1;
|
|
long rcu_try_flip_a2;
|
|
long rcu_try_flip_z1;
|
|
long rcu_try_flip_ze1;
|
|
long rcu_try_flip_z2;
|
|
long rcu_try_flip_m1;
|
|
long rcu_try_flip_me1;
|
|
long rcu_try_flip_m2;
|
|
};
|
|
|
|
#ifdef CONFIG_RCU_TRACE
|
|
#define RCU_TRACE(fn, arg) fn(arg);
|
|
#else
|
|
#define RCU_TRACE(fn, arg)
|
|
#endif
|
|
|
|
extern void rcupreempt_trace_move2done(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_move2wait(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_e1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_i1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_ie1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_g1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_a1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_ae1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_a2(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_z1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_ze1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_z2(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_m1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_me1(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_try_flip_m2(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_check_callbacks(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_done_remove(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_invoke(struct rcupreempt_trace *trace);
|
|
extern void rcupreempt_trace_next_add(struct rcupreempt_trace *trace);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __LINUX_RCUPREEMPT_TRACE_H */
|