projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9b1d82fa PM |
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 - | |
| 4ce5b903 | 23 | * Documentation/RCU |
| 9b1d82fa | 24 | */ |
| 9b1d82fa PM |
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); | |
| 9b1d82fa | 41 | |
| 6ebb237b PM |
42 | static inline int rcu_needs_cpu(int cpu) |
| 43 | { | |
| 44 | return 0; | |
| 45 | } | |
| 46 | ||
| 9b1d82fa PM |
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 | ||
| bf66f18e PM |
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 | ||
| 6ebb237b PM |
77 | #define synchronize_rcu synchronize_sched |
| 78 | ||
| 9b1d82fa PM |
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; | |
| 9b1d82fa PM |
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 | ||
| 234da7bc FW |
112 | static inline int rcu_preempt_depth(void) |
| 113 | { | |
| 114 | return 0; | |
| 115 | } | |
| 116 | ||
| 9b1d82fa | 117 | #endif /* __LINUX_RCUTINY_H */ |