projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a9b7343e | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 64db4cff PM |
2 | /* |
| 3 | * Read-Copy Update mechanism for mutual exclusion (tree-based version) | |
| 4 | * | |
| 64db4cff PM |
5 | * Copyright IBM Corporation, 2008 |
| 6 | * | |
| 7 | * Author: Dipankar Sarma <dipankar@in.ibm.com> | |
| a9b7343e | 8 | * Paul E. McKenney <paulmck@linux.ibm.com> Hierarchical algorithm |
| 64db4cff | 9 | * |
| a9b7343e | 10 | * Based on the original work by Paul McKenney <paulmck@linux.ibm.com> |
| 64db4cff PM |
11 | * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen. |
| 12 | * | |
| 13 | * For detailed explanation of Read-Copy Update mechanism see - | |
| a71fca58 | 14 | * Documentation/RCU |
| 64db4cff PM |
15 | */ |
| 16 | ||
| 17 | #ifndef __LINUX_RCUTREE_H | |
| 18 | #define __LINUX_RCUTREE_H | |
| 19 | ||
| d28139c4 | 20 | void rcu_softirq_qs(void); |
| bcbfdd01 | 21 | void rcu_note_context_switch(bool preempt); |
| 29845399 | 22 | int rcu_needs_cpu(void); |
| 584dc4ce | 23 | void rcu_cpu_stall_reset(void); |
| 64db4cff | 24 | |
| 29ce8310 GN |
25 | /* |
| 26 | * Note a virtualization-based context switch. This is simply a | |
| 27 | * wrapper around rcu_note_context_switch(), which allows TINY_RCU | |
| 46a5d164 | 28 | * to save a few bytes. The caller must have disabled interrupts. |
| 29ce8310 GN |
29 | */ |
| 30 | static inline void rcu_virt_note_context_switch(int cpu) | |
| 31 | { | |
| bcbfdd01 | 32 | rcu_note_context_switch(false); |
| 29ce8310 GN |
33 | } |
| 34 | ||
| 584dc4ce | 35 | void synchronize_rcu_expedited(void); |
| c408b215 | 36 | void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func); |
| 486e2593 | 37 | |
| 584dc4ce | 38 | void rcu_barrier(void); |
| 17672480 | 39 | bool rcu_eqs_special_set(int cpu); |
| 366237e7 | 40 | void rcu_momentary_dyntick_idle(void); |
| a35d1690 | 41 | void kfree_rcu_scheduler_running(void); |
| 6be7436d | 42 | bool rcu_gp_might_be_stalled(void); |
| d96c52fe PM |
43 | unsigned long start_poll_synchronize_rcu_expedited(void); |
| 44 | void cond_synchronize_rcu_expedited(unsigned long oldstate); | |
| 765a3f4f | 45 | unsigned long get_state_synchronize_rcu(void); |
| 7abb18bd PM |
46 | unsigned long start_poll_synchronize_rcu(void); |
| 47 | bool poll_state_synchronize_rcu(unsigned long oldstate); | |
| 765a3f4f | 48 | void cond_synchronize_rcu(unsigned long oldstate); |
| a57eb940 | 49 | |
| 3fcd6a23 | 50 | bool rcu_is_idle_cpu(int cpu); |
| 51952bc6 | 51 | |
| 07325d4a TG |
52 | #ifdef CONFIG_PROVE_RCU |
| 53 | void rcu_irq_exit_check_preempt(void); | |
| 54 | #else | |
| 55 | static inline void rcu_irq_exit_check_preempt(void) { } | |
| 56 | #endif | |
| 57 | ||
| 17211455 FW |
58 | struct task_struct; |
| 59 | void rcu_preempt_deferred_qs(struct task_struct *t); | |
| 60 | ||
| 584dc4ce | 61 | void exit_rcu(void); |
| 2439b696 | 62 | |
| 584dc4ce | 63 | void rcu_scheduler_starting(void); |
| e6339d3b | 64 | extern int rcu_scheduler_active; |
| d2b1654f | 65 | void rcu_end_inkernel_boot(void); |
| 59ee0326 | 66 | bool rcu_inkernel_boot_has_ended(void); |
| 584dc4ce | 67 | bool rcu_is_watching(void); |
| 01b1d88b | 68 | #ifndef CONFIG_PREEMPTION |
| 5cd37193 | 69 | void rcu_all_qs(void); |
| 395a2f09 | 70 | #endif |
| 5cd37193 | 71 | |
| 4df83742 TG |
72 | /* RCUtree hotplug events */ |
| 73 | int rcutree_prepare_cpu(unsigned int cpu); | |
| 74 | int rcutree_online_cpu(unsigned int cpu); | |
| 75 | int rcutree_offline_cpu(unsigned int cpu); | |
| 76 | int rcutree_dead_cpu(unsigned int cpu); | |
| 77 | int rcutree_dying_cpu(unsigned int cpu); | |
| f64c6013 | 78 | void rcu_cpu_starting(unsigned int cpu); |
| 4df83742 | 79 | |
| 64db4cff | 80 | #endif /* __LINUX_RCUTREE_H */ |