Linux kernel mirror (for testing)
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linux
1/*
2 * Read-Copy Update mechanism for mutual exclusion (RT implementation)
3 *
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.
8 *
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.
13 *
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.
17 *
18 * Copyright (C) IBM Corporation, 2006
19 *
20 * Author: Paul McKenney <paulmck@us.ibm.com>
21 *
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.
24 * Papers:
25 * http://www.rdrop.com/users/paulmck/paper/rclockpdcsproof.pdf
26 * http://lse.sourceforge.net/locking/rclock_OLS.2001.05.01c.sc.pdf (OLS2001)
27 *
28 * For detailed explanation of the Preemptible Read-Copy Update mechanism see -
29 * http://lwn.net/Articles/253651/
30 */
31
32#ifndef __LINUX_RCUPREEMPT_TRACE_H
33#define __LINUX_RCUPREEMPT_TRACE_H
34
35#ifdef __KERNEL__
36#include <linux/types.h>
37#include <linux/kernel.h>
38
39#include <asm/atomic.h>
40
41/*
42 * PREEMPT_RCU data structures.
43 */
44
45struct rcupreempt_trace {
46 long next_length;
47 long next_add;
48 long wait_length;
49 long wait_add;
50 long done_length;
51 long done_add;
52 long done_remove;
53 atomic_t done_invoked;
54 long rcu_check_callbacks;
55 atomic_t rcu_try_flip_1;
56 atomic_t rcu_try_flip_e1;
57 long rcu_try_flip_i1;
58 long rcu_try_flip_ie1;
59 long rcu_try_flip_g1;
60 long rcu_try_flip_a1;
61 long rcu_try_flip_ae1;
62 long rcu_try_flip_a2;
63 long rcu_try_flip_z1;
64 long rcu_try_flip_ze1;
65 long rcu_try_flip_z2;
66 long rcu_try_flip_m1;
67 long rcu_try_flip_me1;
68 long rcu_try_flip_m2;
69};
70
71#ifdef CONFIG_RCU_TRACE
72#define RCU_TRACE(fn, arg) fn(arg);
73#else
74#define RCU_TRACE(fn, arg)
75#endif
76
77extern void rcupreempt_trace_move2done(struct rcupreempt_trace *trace);
78extern void rcupreempt_trace_move2wait(struct rcupreempt_trace *trace);
79extern void rcupreempt_trace_try_flip_1(struct rcupreempt_trace *trace);
80extern void rcupreempt_trace_try_flip_e1(struct rcupreempt_trace *trace);
81extern void rcupreempt_trace_try_flip_i1(struct rcupreempt_trace *trace);
82extern void rcupreempt_trace_try_flip_ie1(struct rcupreempt_trace *trace);
83extern void rcupreempt_trace_try_flip_g1(struct rcupreempt_trace *trace);
84extern void rcupreempt_trace_try_flip_a1(struct rcupreempt_trace *trace);
85extern void rcupreempt_trace_try_flip_ae1(struct rcupreempt_trace *trace);
86extern void rcupreempt_trace_try_flip_a2(struct rcupreempt_trace *trace);
87extern void rcupreempt_trace_try_flip_z1(struct rcupreempt_trace *trace);
88extern void rcupreempt_trace_try_flip_ze1(struct rcupreempt_trace *trace);
89extern void rcupreempt_trace_try_flip_z2(struct rcupreempt_trace *trace);
90extern void rcupreempt_trace_try_flip_m1(struct rcupreempt_trace *trace);
91extern void rcupreempt_trace_try_flip_me1(struct rcupreempt_trace *trace);
92extern void rcupreempt_trace_try_flip_m2(struct rcupreempt_trace *trace);
93extern void rcupreempt_trace_check_callbacks(struct rcupreempt_trace *trace);
94extern void rcupreempt_trace_done_remove(struct rcupreempt_trace *trace);
95extern void rcupreempt_trace_invoke(struct rcupreempt_trace *trace);
96extern void rcupreempt_trace_next_add(struct rcupreempt_trace *trace);
97
98#endif /* __KERNEL__ */
99#endif /* __LINUX_RCUPREEMPT_TRACE_H */