2 * Read-Copy Update mechanism for mutual exclusion (RT implementation)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * Copyright (C) IBM Corporation, 2006
20 * Author: Paul McKenney <paulmck@us.ibm.com>
22 * Based on the original work by Paul McKenney <paul.mckenney@us.ibm.com>
23 * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen.
25 * http://www.rdrop.com/users/paulmck/paper/rclockpdcsproof.pdf
26 * http://lse.sourceforge.net/locking/rclock_OLS.2001.05.01c.sc.pdf (OLS2001)
28 * For detailed explanation of the Preemptible Read-Copy Update mechanism see -
29 * http://lwn.net/Articles/253651/
32 #ifndef __LINUX_RCUPREEMPT_TRACE_H
33 #define __LINUX_RCUPREEMPT_TRACE_H
36 #include <linux/types.h>
37 #include <linux/kernel.h>
39 #include <asm/atomic.h>
42 * PREEMPT_RCU data structures.
45 struct rcupreempt_trace {
53 atomic_t done_invoked;
54 long rcu_check_callbacks;
55 atomic_t rcu_try_flip_1;
56 atomic_t rcu_try_flip_e1;
58 long rcu_try_flip_ie1;
61 long rcu_try_flip_ae1;
64 long rcu_try_flip_ze1;
67 long rcu_try_flip_me1;
71 #ifdef CONFIG_RCU_TRACE
72 #define RCU_TRACE(fn, arg) fn(arg);
74 #define RCU_TRACE(fn, arg)
77 extern void rcupreempt_trace_move2done(struct rcupreempt_trace *trace);
78 extern void rcupreempt_trace_move2wait(struct rcupreempt_trace *trace);
79 extern void rcupreempt_trace_try_flip_1(struct rcupreempt_trace *trace);
80 extern void rcupreempt_trace_try_flip_e1(struct rcupreempt_trace *trace);
81 extern void rcupreempt_trace_try_flip_i1(struct rcupreempt_trace *trace);
82 extern void rcupreempt_trace_try_flip_ie1(struct rcupreempt_trace *trace);
83 extern void rcupreempt_trace_try_flip_g1(struct rcupreempt_trace *trace);
84 extern void rcupreempt_trace_try_flip_a1(struct rcupreempt_trace *trace);
85 extern void rcupreempt_trace_try_flip_ae1(struct rcupreempt_trace *trace);
86 extern void rcupreempt_trace_try_flip_a2(struct rcupreempt_trace *trace);
87 extern void rcupreempt_trace_try_flip_z1(struct rcupreempt_trace *trace);
88 extern void rcupreempt_trace_try_flip_ze1(struct rcupreempt_trace *trace);
89 extern void rcupreempt_trace_try_flip_z2(struct rcupreempt_trace *trace);
90 extern void rcupreempt_trace_try_flip_m1(struct rcupreempt_trace *trace);
91 extern void rcupreempt_trace_try_flip_me1(struct rcupreempt_trace *trace);
92 extern void rcupreempt_trace_try_flip_m2(struct rcupreempt_trace *trace);
93 extern void rcupreempt_trace_check_callbacks(struct rcupreempt_trace *trace);
94 extern void rcupreempt_trace_done_remove(struct rcupreempt_trace *trace);
95 extern void rcupreempt_trace_invoke(struct rcupreempt_trace *trace);
96 extern void rcupreempt_trace_next_add(struct rcupreempt_trace *trace);
98 #endif /* __KERNEL__ */
99 #endif /* __LINUX_RCUPREEMPT_TRACE_H */