Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Read-Copy Update mechanism for mutual exclusion (tree-based version)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, you can access it online at
16 * http://www.gnu.org/licenses/gpl-2.0.html.
17 *
18 * Copyright IBM Corporation, 2008
19 *
20 * Author: Dipankar Sarma <dipankar@in.ibm.com>
21 * Paul E. McKenney <paulmck@linux.vnet.ibm.com> Hierarchical algorithm
22 *
23 * Based on the original work by Paul McKenney <paulmck@us.ibm.com>
24 * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen.
25 *
26 * For detailed explanation of Read-Copy Update mechanism see -
27 * Documentation/RCU
28 */
29
30#ifndef __LINUX_RCUTREE_H
31#define __LINUX_RCUTREE_H
32
33void rcu_softirq_qs(void);
34void rcu_note_context_switch(bool preempt);
35int rcu_needs_cpu(u64 basem, u64 *nextevt);
36void rcu_cpu_stall_reset(void);
37
38/*
39 * Note a virtualization-based context switch. This is simply a
40 * wrapper around rcu_note_context_switch(), which allows TINY_RCU
41 * to save a few bytes. The caller must have disabled interrupts.
42 */
43static inline void rcu_virt_note_context_switch(int cpu)
44{
45 rcu_note_context_switch(false);
46}
47
48void synchronize_rcu_expedited(void);
49void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
50
51void rcu_barrier(void);
52bool rcu_eqs_special_set(int cpu);
53unsigned long get_state_synchronize_rcu(void);
54void cond_synchronize_rcu(unsigned long oldstate);
55
56void rcu_idle_enter(void);
57void rcu_idle_exit(void);
58void rcu_irq_enter(void);
59void rcu_irq_exit(void);
60void rcu_irq_enter_irqson(void);
61void rcu_irq_exit_irqson(void);
62
63void exit_rcu(void);
64
65void rcu_scheduler_starting(void);
66extern int rcu_scheduler_active __read_mostly;
67void rcu_end_inkernel_boot(void);
68bool rcu_is_watching(void);
69#ifndef CONFIG_PREEMPT
70void rcu_all_qs(void);
71#endif
72
73/* RCUtree hotplug events */
74int rcutree_prepare_cpu(unsigned int cpu);
75int rcutree_online_cpu(unsigned int cpu);
76int rcutree_offline_cpu(unsigned int cpu);
77int rcutree_dead_cpu(unsigned int cpu);
78int rcutree_dying_cpu(unsigned int cpu);
79void rcu_cpu_starting(unsigned int cpu);
80
81#endif /* __LINUX_RCUTREE_H */