#ifndef _LINUX_CPUSET_H
  #define _LINUX_CPUSET_H
  /*
   *  cpuset interface
   *
   *  Copyright (C) 2003 BULL SA

   *  Copyright (C) 2004-2006 Silicon Graphics, Inc.

   *
   */
  
  #include <linux/sched.h>
  #include <linux/cpumask.h>
  #include <linux/nodemask.h>

  #include <linux/cgroup.h>

  #include <linux/mm.h>

  
  #ifdef CONFIG_CPUSETS

  extern int number_of_cpusets;	/* How many cpusets are defined in system? */

  extern int cpuset_init(void);
  extern void cpuset_init_smp(void);

  extern void cpuset_update_active_cpus(void);

  extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);

  extern int cpuset_cpus_allowed_fallback(struct task_struct *p);

  extern nodemask_t cpuset_mems_allowed(struct task_struct *p);

  #define cpuset_current_mems_allowed (current->mems_allowed)

  void cpuset_init_current_mems_allowed(void);

  int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);

  extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
  extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);

  static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)

  {
  	return number_of_cpusets <= 1 ||

  		__cpuset_node_allowed_softwall(node, gfp_mask);

  }

  static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)

  {

  	return number_of_cpusets <= 1 ||

  		__cpuset_node_allowed_hardwall(node, gfp_mask);
  }
  
  static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
  {
  	return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
  }
  
  static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
  {
  	return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);

  }

  extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
  					  const struct task_struct *tsk2);

  
  #define cpuset_memory_pressure_bump() 				\
  	do {							\
  		if (cpuset_memory_pressure_enabled)		\
  			__cpuset_memory_pressure_bump();	\
  	} while (0)
  extern int cpuset_memory_pressure_enabled;
  extern void __cpuset_memory_pressure_bump(void);

  extern const struct file_operations proc_cpuset_operations;

  struct seq_file;
  extern void cpuset_task_status_allowed(struct seq_file *m,
  					struct task_struct *task);

  extern int cpuset_mem_spread_node(void);

  extern int cpuset_slab_spread_node(void);

  
  static inline int cpuset_do_page_mem_spread(void)
  {
  	return current->flags & PF_SPREAD_PAGE;
  }
  
  static inline int cpuset_do_slab_mem_spread(void)
  {
  	return current->flags & PF_SPREAD_SLAB;
  }

  extern int current_cpuset_is_being_rebound(void);

  extern void rebuild_sched_domains(void);

  extern void cpuset_print_task_mems_allowed(struct task_struct *p);

  /*
   * reading current mems_allowed and mempolicy in the fastpath must protected
   * by get_mems_allowed()
   */
  static inline void get_mems_allowed(void)
  {
  	current->mems_allowed_change_disable++;
  
  	/*
  	 * ensure that reading mems_allowed and mempolicy happens after the
  	 * update of ->mems_allowed_change_disable.
  	 *
  	 * the write-side task finds ->mems_allowed_change_disable is not 0,
  	 * and knows the read-side task is reading mems_allowed or mempolicy,
  	 * so it will clear old bits lazily.
  	 */
  	smp_mb();
  }
  
  static inline void put_mems_allowed(void)
  {
  	/*
  	 * ensure that reading mems_allowed and mempolicy before reducing
  	 * mems_allowed_change_disable.
  	 *
  	 * the write-side task will know that the read-side task is still
  	 * reading mems_allowed or mempolicy, don't clears old bits in the
  	 * nodemask.
  	 */
  	smp_mb();
  	--ACCESS_ONCE(current->mems_allowed_change_disable);
  }

  static inline void set_mems_allowed(nodemask_t nodemask)
  {

  	task_lock(current);

  	current->mems_allowed = nodemask;

  	task_unlock(current);

  }

  #else /* !CONFIG_CPUSETS */
  
  static inline int cpuset_init(void) { return 0; }
  static inline void cpuset_init_smp(void) {}

  static inline void cpuset_update_active_cpus(void)
  {
  	partition_sched_domains(1, NULL, NULL);
  }

  static inline void cpuset_cpus_allowed(struct task_struct *p,
  				       struct cpumask *mask)

  {

  	cpumask_copy(mask, cpu_possible_mask);

  }

  static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
  {

  	do_set_cpus_allowed(p, cpu_possible_mask);

  	return cpumask_any(cpu_active_mask);
  }

  static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
  {
  	return node_possible_map;
  }

  #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])

  static inline void cpuset_init_current_mems_allowed(void) {}

  static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)

  {
  	return 1;
  }

  static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
  {
  	return 1;
  }
  
  static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
  {
  	return 1;
  }

  static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
  {
  	return 1;
  }
  
  static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)

  {
  	return 1;
  }

  static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
  						 const struct task_struct *tsk2)

  {
  	return 1;
  }

  static inline void cpuset_memory_pressure_bump(void) {}

  static inline void cpuset_task_status_allowed(struct seq_file *m,
  						struct task_struct *task)

  {

  }

  static inline int cpuset_mem_spread_node(void)
  {
  	return 0;
  }

  static inline int cpuset_slab_spread_node(void)
  {
  	return 0;
  }

  static inline int cpuset_do_page_mem_spread(void)
  {
  	return 0;
  }
  
  static inline int cpuset_do_slab_mem_spread(void)
  {
  	return 0;
  }

  static inline int current_cpuset_is_being_rebound(void)
  {
  	return 0;
  }

  static inline void rebuild_sched_domains(void)
  {

  	partition_sched_domains(1, NULL, NULL);

  }

  static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
  {
  }

  static inline void set_mems_allowed(nodemask_t nodemask)
  {
  }

  static inline void get_mems_allowed(void)
  {
  }
  
  static inline void put_mems_allowed(void)
  {
  }

  #endif /* !CONFIG_CPUSETS */
  
  #endif /* _LINUX_CPUSET_H */