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 - | |
| 23 | * Documentation/RCU | |
| 24 | */ | |
| 25 | ||
| 26 | #ifndef __LINUX_TINY_H | |
| 27 | #define __LINUX_TINY_H | |
| 28 | ||
| 29 | #include <linux/cache.h> | |
| 30 | ||
| 31 | void rcu_sched_qs(int cpu); | |
| 32 | void rcu_bh_qs(int cpu); | |
| 33 | ||
| 34 | #define __rcu_read_lock() preempt_disable() | |
| 35 | #define __rcu_read_unlock() preempt_enable() | |
| 36 | #define __rcu_read_lock_bh() local_bh_disable() | |
| 37 | #define __rcu_read_unlock_bh() local_bh_enable() | |
| 38 | #define call_rcu_sched call_rcu | |
| 39 | ||
| 40 | #define rcu_init_sched() do { } while (0) | |
| 41 | extern void rcu_check_callbacks(int cpu, int user); | |
| 42 | extern void __rcu_init(void); | |
| 43 | ||
| 44 | /* | |
| 45 | * Return the number of grace periods. | |
| 46 | */ | |
| 47 | static inline long rcu_batches_completed(void) | |
| 48 | { | |
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | /* | |
| 53 | * Return the number of bottom-half grace periods. | |
| 54 | */ | |
| 55 | static inline long rcu_batches_completed_bh(void) | |
| 56 | { | |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | extern int rcu_expedited_torture_stats(char *page); | |
| 61 | ||
| 62 | static inline void synchronize_rcu_expedited(void) | |
| 63 | { | |
| 64 | synchronize_sched(); | |
| 65 | } | |
| 66 | ||
| 67 | static inline void synchronize_rcu_bh_expedited(void) | |
| 68 | { | |
| 69 | synchronize_sched(); | |
| 70 | } | |
| 71 | ||
| 72 | struct notifier_block; | |
| 73 | extern int rcu_cpu_notify(struct notifier_block *self, | |
| 74 | unsigned long action, void *hcpu); | |
| 75 | ||
| 76 | #ifdef CONFIG_NO_HZ | |
| 77 | ||
| 78 | extern void rcu_enter_nohz(void); | |
| 79 | extern void rcu_exit_nohz(void); | |
| 80 | ||
| 81 | #else /* #ifdef CONFIG_NO_HZ */ | |
| 82 | ||
| 83 | static inline void rcu_enter_nohz(void) | |
| 84 | { | |
| 85 | } | |
| 86 | ||
| 87 | static inline void rcu_exit_nohz(void) | |
| 88 | { | |
| 89 | } | |
| 90 | ||
| 91 | #endif /* #else #ifdef CONFIG_NO_HZ */ | |
| 92 | ||
| 93 | static inline void exit_rcu(void) | |
| 94 | { | |
| 95 | } | |
| 96 | ||
| 97 | #endif /* __LINUX_RCUTINY_H */ |