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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); |
c1ad348b | 22 | int rcu_needs_cpu(u64 basem, u64 *nextevt); |
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); |
b6a4ae76 | 36 | void kfree_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); |
765a3f4f PM |
40 | unsigned long get_state_synchronize_rcu(void); |
41 | void cond_synchronize_rcu(unsigned long oldstate); | |
a57eb940 | 42 | |
51952bc6 PM |
43 | void rcu_idle_enter(void); |
44 | void rcu_idle_exit(void); | |
45 | void rcu_irq_enter(void); | |
46 | void rcu_irq_exit(void); | |
7c9906ca PM |
47 | void rcu_irq_enter_irqson(void); |
48 | void rcu_irq_exit_irqson(void); | |
51952bc6 | 49 | |
584dc4ce | 50 | void exit_rcu(void); |
2439b696 | 51 | |
584dc4ce | 52 | void rcu_scheduler_starting(void); |
bbad9379 | 53 | extern int rcu_scheduler_active __read_mostly; |
d2b1654f | 54 | void rcu_end_inkernel_boot(void); |
584dc4ce | 55 | bool rcu_is_watching(void); |
395a2f09 | 56 | #ifndef CONFIG_PREEMPT |
5cd37193 | 57 | void rcu_all_qs(void); |
395a2f09 | 58 | #endif |
5cd37193 | 59 | |
4df83742 TG |
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); | |
f64c6013 | 66 | void rcu_cpu_starting(unsigned int cpu); |
4df83742 | 67 | |
64db4cff | 68 | #endif /* __LINUX_RCUTREE_H */ |