| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Read-Copy Update mechanism for mutual exclusion (tree-based version) |
| * |
| * Copyright IBM Corporation, 2008 |
| * |
| * Author: Dipankar Sarma <dipankar@in.ibm.com> |
| * Paul E. McKenney <paulmck@linux.ibm.com> Hierarchical algorithm |
| * |
| * Based on the original work by Paul McKenney <paulmck@linux.ibm.com> |
| * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen. |
| * |
| * For detailed explanation of Read-Copy Update mechanism see - |
| * Documentation/RCU |
| */ |
| |
| #ifndef __LINUX_RCUTREE_H |
| #define __LINUX_RCUTREE_H |
| |
| void rcu_softirq_qs(void); |
| void rcu_note_context_switch(bool preempt); |
| int rcu_needs_cpu(u64 basem, u64 *nextevt); |
| void rcu_cpu_stall_reset(void); |
| |
| /* |
| * Note a virtualization-based context switch. This is simply a |
| * wrapper around rcu_note_context_switch(), which allows TINY_RCU |
| * to save a few bytes. The caller must have disabled interrupts. |
| */ |
| static inline void rcu_virt_note_context_switch(int cpu) |
| { |
| rcu_note_context_switch(false); |
| } |
| |
| void synchronize_rcu_expedited(void); |
| void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func); |
| |
| void rcu_barrier(void); |
| bool rcu_eqs_special_set(int cpu); |
| void rcu_momentary_dyntick_idle(void); |
| void kfree_rcu_scheduler_running(void); |
| bool rcu_gp_might_be_stalled(void); |
| unsigned long get_state_synchronize_rcu(void); |
| void cond_synchronize_rcu(unsigned long oldstate); |
| |
| void rcu_idle_enter(void); |
| void rcu_idle_exit(void); |
| void rcu_irq_enter(void); |
| void rcu_irq_exit(void); |
| void rcu_irq_exit_preempt(void); |
| void rcu_irq_enter_irqson(void); |
| void rcu_irq_exit_irqson(void); |
| bool rcu_is_idle_cpu(int cpu); |
| |
| #ifdef CONFIG_PROVE_RCU |
| void rcu_irq_exit_check_preempt(void); |
| #else |
| static inline void rcu_irq_exit_check_preempt(void) { } |
| #endif |
| |
| void exit_rcu(void); |
| |
| void rcu_scheduler_starting(void); |
| extern int rcu_scheduler_active __read_mostly; |
| void rcu_end_inkernel_boot(void); |
| bool rcu_inkernel_boot_has_ended(void); |
| bool rcu_is_watching(void); |
| #ifndef CONFIG_PREEMPTION |
| void rcu_all_qs(void); |
| #endif |
| |
| /* RCUtree hotplug events */ |
| int rcutree_prepare_cpu(unsigned int cpu); |
| int rcutree_online_cpu(unsigned int cpu); |
| int rcutree_offline_cpu(unsigned int cpu); |
| int rcutree_dead_cpu(unsigned int cpu); |
| int rcutree_dying_cpu(unsigned int cpu); |
| void rcu_cpu_starting(unsigned int cpu); |
| |
| #endif /* __LINUX_RCUTREE_H */ |