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64db4cff PM |
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 | |
87de1cfd PM |
15 | * along with this program; if not, you can access it online at |
16 | * http://www.gnu.org/licenses/gpl-2.0.html. | |
64db4cff PM |
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 - | |
a71fca58 | 27 | * Documentation/RCU |
64db4cff PM |
28 | */ |
29 | ||
30 | #ifndef __LINUX_RCUTREE_H | |
31 | #define __LINUX_RCUTREE_H | |
32 | ||
d28139c4 | 33 | void rcu_softirq_qs(void); |
bcbfdd01 | 34 | void rcu_note_context_switch(bool preempt); |
c1ad348b | 35 | int rcu_needs_cpu(u64 basem, u64 *nextevt); |
584dc4ce | 36 | void rcu_cpu_stall_reset(void); |
64db4cff | 37 | |
29ce8310 GN |
38 | /* |
39 | * Note a virtualization-based context switch. This is simply a | |
40 | * wrapper around rcu_note_context_switch(), which allows TINY_RCU | |
46a5d164 | 41 | * to save a few bytes. The caller must have disabled interrupts. |
29ce8310 GN |
42 | */ |
43 | static inline void rcu_virt_note_context_switch(int cpu) | |
44 | { | |
bcbfdd01 | 45 | rcu_note_context_switch(false); |
29ce8310 GN |
46 | } |
47 | ||
584dc4ce | 48 | void synchronize_rcu_expedited(void); |
b6a4ae76 | 49 | void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func); |
486e2593 | 50 | |
584dc4ce | 51 | void rcu_barrier(void); |
17672480 | 52 | bool rcu_eqs_special_set(int cpu); |
765a3f4f PM |
53 | unsigned long get_state_synchronize_rcu(void); |
54 | void cond_synchronize_rcu(unsigned long oldstate); | |
a57eb940 | 55 | |
51952bc6 PM |
56 | void rcu_idle_enter(void); |
57 | void rcu_idle_exit(void); | |
58 | void rcu_irq_enter(void); | |
59 | void rcu_irq_exit(void); | |
7c9906ca PM |
60 | void rcu_irq_enter_irqson(void); |
61 | void rcu_irq_exit_irqson(void); | |
51952bc6 | 62 | |
584dc4ce | 63 | void exit_rcu(void); |
2439b696 | 64 | |
584dc4ce | 65 | void rcu_scheduler_starting(void); |
bbad9379 | 66 | extern int rcu_scheduler_active __read_mostly; |
d2b1654f | 67 | void rcu_end_inkernel_boot(void); |
584dc4ce | 68 | bool rcu_is_watching(void); |
395a2f09 | 69 | #ifndef CONFIG_PREEMPT |
5cd37193 | 70 | void rcu_all_qs(void); |
395a2f09 | 71 | #endif |
5cd37193 | 72 | |
4df83742 TG |
73 | /* RCUtree hotplug events */ |
74 | int rcutree_prepare_cpu(unsigned int cpu); | |
75 | int rcutree_online_cpu(unsigned int cpu); | |
76 | int rcutree_offline_cpu(unsigned int cpu); | |
77 | int rcutree_dead_cpu(unsigned int cpu); | |
78 | int rcutree_dying_cpu(unsigned int cpu); | |
f64c6013 | 79 | void rcu_cpu_starting(unsigned int cpu); |
4df83742 | 80 | |
64db4cff | 81 | #endif /* __LINUX_RCUTREE_H */ |