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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | /* * Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright IBM Corporation, 2008 * * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com> * * For detailed explanation of Read-Copy Update mechanism see - * Documentation/RCU */ #ifndef __LINUX_TINY_H #define __LINUX_TINY_H #include <linux/cache.h> void rcu_sched_qs(int cpu); void rcu_bh_qs(int cpu); static inline void rcu_note_context_switch(int cpu) { rcu_sched_qs(cpu); } #define __rcu_read_lock() preempt_disable() #define __rcu_read_unlock() preempt_enable() #define __rcu_read_lock_bh() local_bh_disable() #define __rcu_read_unlock_bh() local_bh_enable() #define call_rcu_sched call_rcu #define rcu_init_sched() do { } while (0) extern void rcu_check_callbacks(int cpu, int user); static inline int rcu_needs_cpu(int cpu) { return 0; } /* * Return the number of grace periods. */ static inline long rcu_batches_completed(void) { return 0; } /* * Return the number of bottom-half grace periods. */ static inline long rcu_batches_completed_bh(void) { return 0; } static inline void rcu_force_quiescent_state(void) { } static inline void rcu_bh_force_quiescent_state(void) { } static inline void rcu_sched_force_quiescent_state(void) { } extern void synchronize_sched(void); static inline void synchronize_rcu(void) { synchronize_sched(); } static inline void synchronize_rcu_bh(void) { synchronize_sched(); } static inline void synchronize_rcu_expedited(void) { synchronize_sched(); } static inline void synchronize_rcu_bh_expedited(void) { synchronize_sched(); } struct notifier_block; #ifdef CONFIG_NO_HZ extern void rcu_enter_nohz(void); extern void rcu_exit_nohz(void); #else /* #ifdef CONFIG_NO_HZ */ static inline void rcu_enter_nohz(void) { } static inline void rcu_exit_nohz(void) { } #endif /* #else #ifdef CONFIG_NO_HZ */ static inline void exit_rcu(void) { } static inline int rcu_preempt_depth(void) { return 0; } #ifdef CONFIG_DEBUG_LOCK_ALLOC extern int rcu_scheduler_active __read_mostly; extern void rcu_scheduler_starting(void); #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ static inline void rcu_scheduler_starting(void) { } #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */ #endif /* __LINUX_RCUTINY_H */ |