/*
   * 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>

  #ifdef CONFIG_RCU_BOOST

  static inline void rcu_init(void)
  {
  }

  #else /* #ifdef CONFIG_RCU_BOOST */
  void rcu_init(void);
  #endif /* #else #ifdef CONFIG_RCU_BOOST */

  static inline void rcu_barrier_bh(void)
  {
  	wait_rcu_gp(call_rcu_bh);
  }
  
  static inline void rcu_barrier_sched(void)
  {
  	wait_rcu_gp(call_rcu_sched);
  }

  #ifdef CONFIG_TINY_RCU

  static inline void synchronize_rcu_expedited(void)

  {

  	synchronize_sched();	/* Only one CPU, so pretty fast anyway!!! */

  }

  static inline void rcu_barrier(void)

  {

  	rcu_barrier_sched();  /* Only one CPU, so only one list of callbacks! */

  }

  #else /* #ifdef CONFIG_TINY_RCU */

  void synchronize_rcu_expedited(void);

  static inline void rcu_barrier(void)
  {
  	wait_rcu_gp(call_rcu);
  }

  #endif /* #else #ifdef CONFIG_TINY_RCU */

  static inline void synchronize_rcu_bh(void)

  {
  	synchronize_sched();
  }
  
  static inline void synchronize_rcu_bh_expedited(void)
  {
  	synchronize_sched();
  }

  static inline void synchronize_sched_expedited(void)
  {
  	synchronize_sched();
  }

  #ifdef CONFIG_TINY_RCU
  
  static inline void rcu_preempt_note_context_switch(void)
  {
  }

  static inline void exit_rcu(void)
  {
  }

  static inline int rcu_needs_cpu(int cpu)
  {
  	return 0;
  }

  #else /* #ifdef CONFIG_TINY_RCU */
  
  void rcu_preempt_note_context_switch(void);
  extern void exit_rcu(void);
  int rcu_preempt_needs_cpu(void);
  
  static inline int rcu_needs_cpu(int cpu)
  {
  	return rcu_preempt_needs_cpu();
  }

  #endif /* #else #ifdef CONFIG_TINY_RCU */
  
  static inline void rcu_note_context_switch(int cpu)
  {
  	rcu_sched_qs(cpu);
  	rcu_preempt_note_context_switch();
  }

  /*

   * Take advantage of the fact that there is only one CPU, which
   * allows us to ignore virtualization-based context switches.
   */
  static inline void rcu_virt_note_context_switch(int cpu)
  {
  }
  
  /*

   * 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)
  {
  }

  static inline void rcu_cpu_stall_reset(void)
  {
  }

  #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 */