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1 | /* |
2 | * Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition. |
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 IBM Corporation, 2008 |
19 | * |
20 | * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
21 | * |
22 | * For detailed explanation of Read-Copy Update mechanism see - |
23 | * Documentation/RCU |
24 | */ |
25 | #ifndef __LINUX_TINY_H |
26 | #define __LINUX_TINY_H |
27 | |
28 | #include <linux/cache.h> |
29 | |
30 | void rcu_sched_qs(int cpu); |
31 | void rcu_bh_qs(int cpu); |
32 | |
33 | #define __rcu_read_lock() preempt_disable() |
34 | #define __rcu_read_unlock() preempt_enable() |
35 | #define __rcu_read_lock_bh() local_bh_disable() |
36 | #define __rcu_read_unlock_bh() local_bh_enable() |
37 | #define call_rcu_sched call_rcu |
38 | |
39 | #define rcu_init_sched() do { } while (0) |
40 | extern void rcu_check_callbacks(int cpu, int user); |
41 | |
42 | static inline int rcu_needs_cpu(int cpu) |
43 | { |
44 | return 0; |
45 | } |
46 | |
47 | /* |
48 | * Return the number of grace periods. |
49 | */ |
50 | static inline long rcu_batches_completed(void) |
51 | { |
52 | return 0; |
53 | } |
54 | |
55 | /* |
56 | * Return the number of bottom-half grace periods. |
57 | */ |
58 | static inline long rcu_batches_completed_bh(void) |
59 | { |
60 | return 0; |
61 | } |
62 | |
63 | extern int rcu_expedited_torture_stats(char *page); |
64 | |
65 | static inline void rcu_force_quiescent_state(void) |
66 | { |
67 | } |
68 | |
69 | static inline void rcu_bh_force_quiescent_state(void) |
70 | { |
71 | } |
72 | |
73 | static inline void rcu_sched_force_quiescent_state(void) |
74 | { |
75 | } |
76 | |
77 | #define synchronize_rcu synchronize_sched |
78 | |
79 | static inline void synchronize_rcu_expedited(void) |
80 | { |
81 | synchronize_sched(); |
82 | } |
83 | |
84 | static inline void synchronize_rcu_bh_expedited(void) |
85 | { |
86 | synchronize_sched(); |
87 | } |
88 | |
89 | struct notifier_block; |
90 | |
91 | #ifdef CONFIG_NO_HZ |
92 | |
93 | extern void rcu_enter_nohz(void); |
94 | extern void rcu_exit_nohz(void); |
95 | |
96 | #else /* #ifdef CONFIG_NO_HZ */ |
97 | |
98 | static inline void rcu_enter_nohz(void) |
99 | { |
100 | } |
101 | |
102 | static inline void rcu_exit_nohz(void) |
103 | { |
104 | } |
105 | |
106 | #endif /* #else #ifdef CONFIG_NO_HZ */ |
107 | |
108 | static inline void exit_rcu(void) |
109 | { |
110 | } |
111 | |
112 | static inline int rcu_preempt_depth(void) |
113 | { |
114 | return 0; |
115 | } |
116 | |
117 | #endif /* __LINUX_RCUTINY_H */ |
118 |
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v2.6.34-rc5
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