root/include/linux/rcutree.h

INCLUDED FROM

DEFINITIONS

1. rcu_virt_note_context_switch

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Read-Copy Update mechanism for mutual exclusion (tree-based version)
   4  *
   5  * Copyright IBM Corporation, 2008
   6  *
   7  * Author: Dipankar Sarma <dipankar@in.ibm.com>
   8  *         Paul E. McKenney <paulmck@linux.ibm.com> Hierarchical algorithm
   9  *
  10  * Based on the original work by Paul McKenney <paulmck@linux.ibm.com>
  11  * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen.
  12  *
  13  * For detailed explanation of Read-Copy Update mechanism see -
  14  *      Documentation/RCU
  15  */
  16 
  17 #ifndef __LINUX_RCUTREE_H
  18 #define __LINUX_RCUTREE_H
  19 
  20 void rcu_softirq_qs(void);
  21 void rcu_note_context_switch(bool preempt);
  22 int rcu_needs_cpu(u64 basem, u64 *nextevt);
  23 void rcu_cpu_stall_reset(void);
  24 
  25 /*
  26  * Note a virtualization-based context switch.  This is simply a
  27  * wrapper around rcu_note_context_switch(), which allows TINY_RCU
  28  * to save a few bytes. The caller must have disabled interrupts.
  29  */
  30 static inline void rcu_virt_note_context_switch(int cpu)
  31 {
  32         rcu_note_context_switch(false);
  33 }
  34 
  35 void synchronize_rcu_expedited(void);
  36 void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
  37 
  38 void rcu_barrier(void);
  39 bool rcu_eqs_special_set(int cpu);
  40 unsigned long get_state_synchronize_rcu(void);
  41 void cond_synchronize_rcu(unsigned long oldstate);
  42 
  43 void rcu_idle_enter(void);
  44 void rcu_idle_exit(void);
  45 void rcu_irq_enter(void);
  46 void rcu_irq_exit(void);
  47 void rcu_irq_enter_irqson(void);
  48 void rcu_irq_exit_irqson(void);
  49 
  50 void exit_rcu(void);
  51 
  52 void rcu_scheduler_starting(void);
  53 extern int rcu_scheduler_active __read_mostly;
  54 void rcu_end_inkernel_boot(void);
  55 bool rcu_is_watching(void);
  56 #ifndef CONFIG_PREEMPTION
  57 void rcu_all_qs(void);
  58 #endif
  59 
  60 /* RCUtree hotplug events */
  61 int rcutree_prepare_cpu(unsigned int cpu);
  62 int rcutree_online_cpu(unsigned int cpu);
  63 int rcutree_offline_cpu(unsigned int cpu);
  64 int rcutree_dead_cpu(unsigned int cpu);
  65 int rcutree_dying_cpu(unsigned int cpu);
  66 void rcu_cpu_starting(unsigned int cpu);
  67 
  68 #endif /* __LINUX_RCUTREE_H */