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- /* 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 kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
- void rcu_barrier(void);
- bool rcu_eqs_special_set(int cpu);
- 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_enter_irqson(void);
- void rcu_irq_exit_irqson(void);
- void exit_rcu(void);
- void rcu_scheduler_starting(void);
- extern int rcu_scheduler_active __read_mostly;
- void rcu_end_inkernel_boot(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 */
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