Subversion Repositories Kolibri OS

Rev

Rev 6082 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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, you can access it online at
  16.  * http://www.gnu.org/licenses/gpl-2.0.html.
  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. static inline unsigned long get_state_synchronize_rcu(void)
  31. {
  32.         return 0;
  33. }
  34.  
  35. static inline void cond_synchronize_rcu(unsigned long oldstate)
  36. {
  37.         might_sleep();
  38. }
  39.  
  40. static inline unsigned long get_state_synchronize_sched(void)
  41. {
  42.         return 0;
  43. }
  44. static inline void rcu_barrier_bh(void)
  45. {
  46.         wait_rcu_gp(call_rcu_bh);
  47. }
  48.  
  49. static inline void rcu_barrier_sched(void)
  50. {
  51.         wait_rcu_gp(call_rcu_sched);
  52. }
  53.  
  54. static inline void synchronize_rcu_expedited(void)
  55. {
  56.         synchronize_sched();    /* Only one CPU, so pretty fast anyway!!! */
  57. }
  58.  
  59. static inline void rcu_barrier(void)
  60. {
  61.         rcu_barrier_sched();  /* Only one CPU, so only one list of callbacks! */
  62. }
  63.  
  64. static inline void synchronize_rcu_bh(void)
  65. {
  66.         synchronize_sched();
  67. }
  68.  
  69. static inline void synchronize_rcu_bh_expedited(void)
  70. {
  71.         synchronize_sched();
  72. }
  73.  
  74. static inline void synchronize_sched_expedited(void)
  75. {
  76.         synchronize_sched();
  77. }
  78.  
  79. static inline void kfree_call_rcu(struct rcu_head *head,
  80.                                   void (*func)(struct rcu_head *rcu))
  81. {
  82.         call_rcu(head, func);
  83. }
  84.  
  85. static inline void rcu_note_context_switch(void)
  86. {
  87.         rcu_sched_qs();
  88. }
  89.  
  90. /*
  91.  * Take advantage of the fact that there is only one CPU, which
  92.  * allows us to ignore virtualization-based context switches.
  93.  */
  94. static inline void rcu_virt_note_context_switch(int cpu)
  95. {
  96. }
  97.  
  98. /*
  99.  * Return the number of grace periods started.
  100.  */
  101. static inline unsigned long rcu_batches_started(void)
  102. {
  103.         return 0;
  104. }
  105.  
  106. /*
  107.  * Return the number of bottom-half grace periods started.
  108.  */
  109. static inline unsigned long rcu_batches_started_bh(void)
  110. {
  111.         return 0;
  112. }
  113.  
  114. /*
  115.  * Return the number of sched grace periods started.
  116.  */
  117. static inline unsigned long rcu_batches_started_sched(void)
  118. {
  119.         return 0;
  120. }
  121.  
  122. /*
  123.  * Return the number of grace periods completed.
  124.  */
  125. static inline unsigned long rcu_batches_completed(void)
  126. {
  127.         return 0;
  128. }
  129.  
  130. /*
  131.  * Return the number of bottom-half grace periods completed.
  132.  */
  133. static inline unsigned long rcu_batches_completed_bh(void)
  134. {
  135.         return 0;
  136. }
  137.  
  138. /*
  139.  * Return the number of sched grace periods completed.
  140.  */
  141. static inline unsigned long rcu_batches_completed_sched(void)
  142. {
  143.         return 0;
  144. }
  145.  
  146. static inline void rcu_force_quiescent_state(void)
  147. {
  148. }
  149.  
  150. static inline void rcu_bh_force_quiescent_state(void)
  151. {
  152. }
  153.  
  154. static inline void rcu_sched_force_quiescent_state(void)
  155. {
  156. }
  157.  
  158. static inline void show_rcu_gp_kthreads(void)
  159. {
  160. }
  161.  
  162. static inline void rcu_cpu_stall_reset(void)
  163. {
  164. }
  165.  
  166. static inline void rcu_idle_enter(void)
  167. {
  168. }
  169.  
  170. static inline void rcu_idle_exit(void)
  171. {
  172. }
  173.  
  174. static inline void rcu_irq_enter(void)
  175. {
  176. }
  177.  
  178. static inline void rcu_irq_exit(void)
  179. {
  180. }
  181.  
  182. static inline void exit_rcu(void)
  183. {
  184. }
  185.  
  186. #ifdef CONFIG_DEBUG_LOCK_ALLOC
  187. extern int rcu_scheduler_active __read_mostly;
  188. void rcu_scheduler_starting(void);
  189. #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
  190. static inline void rcu_scheduler_starting(void)
  191. {
  192. }
  193. #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
  194.  
  195. #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE)
  196.  
  197. static inline bool rcu_is_watching(void)
  198. {
  199.         return __rcu_is_watching();
  200. }
  201.  
  202. #else /* defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) */
  203.  
  204. static inline bool rcu_is_watching(void)
  205. {
  206.         return true;
  207. }
  208.  
  209. #endif /* #else defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) */
  210.  
  211. static inline void rcu_all_qs(void)
  212. {
  213. }
  214.  
  215. #endif /* __LINUX_RCUTINY_H */
  216.