rcutree.h 2.2 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879
  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. #ifndef __LINUX_RCUTREE_H
  17. #define __LINUX_RCUTREE_H
  18. void rcu_softirq_qs(void);
  19. void rcu_note_context_switch(bool preempt);
  20. int rcu_needs_cpu(u64 basem, u64 *nextevt);
  21. void rcu_cpu_stall_reset(void);
  22. /*
  23. * Note a virtualization-based context switch. This is simply a
  24. * wrapper around rcu_note_context_switch(), which allows TINY_RCU
  25. * to save a few bytes. The caller must have disabled interrupts.
  26. */
  27. static inline void rcu_virt_note_context_switch(int cpu)
  28. {
  29. rcu_note_context_switch(false);
  30. }
  31. void synchronize_rcu_expedited(void);
  32. void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
  33. void rcu_barrier(void);
  34. bool rcu_eqs_special_set(int cpu);
  35. void rcu_momentary_dyntick_idle(void);
  36. void kfree_rcu_scheduler_running(void);
  37. bool rcu_gp_might_be_stalled(void);
  38. unsigned long get_state_synchronize_rcu(void);
  39. void cond_synchronize_rcu(unsigned long oldstate);
  40. void rcu_idle_enter(void);
  41. void rcu_idle_exit(void);
  42. void rcu_irq_enter(void);
  43. void rcu_irq_exit(void);
  44. void rcu_irq_exit_preempt(void);
  45. void rcu_irq_enter_irqson(void);
  46. void rcu_irq_exit_irqson(void);
  47. #ifdef CONFIG_PROVE_RCU
  48. void rcu_irq_exit_check_preempt(void);
  49. #else
  50. static inline void rcu_irq_exit_check_preempt(void) { }
  51. #endif
  52. void exit_rcu(void);
  53. void rcu_scheduler_starting(void);
  54. extern int rcu_scheduler_active __read_mostly;
  55. void rcu_end_inkernel_boot(void);
  56. bool rcu_inkernel_boot_has_ended(void);
  57. bool rcu_is_watching(void);
  58. #ifndef CONFIG_PREEMPTION
  59. void rcu_all_qs(void);
  60. #endif
  61. /* RCUtree hotplug events */
  62. int rcutree_prepare_cpu(unsigned int cpu);
  63. int rcutree_online_cpu(unsigned int cpu);
  64. int rcutree_offline_cpu(unsigned int cpu);
  65. int rcutree_dead_cpu(unsigned int cpu);
  66. int rcutree_dying_cpu(unsigned int cpu);
  67. void rcu_cpu_starting(unsigned int cpu);
  68. #endif /* __LINUX_RCUTREE_H */