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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_LOCAL_LOCK_H
3#define _LINUX_LOCAL_LOCK_H
4
5#include <linux/local_lock_internal.h>
6
7/**
8 * local_lock_init - Runtime initialize a lock instance
9 * @lock: The lock variable
10 */
11#define local_lock_init(lock) __local_lock_init(lock)
12
13/**
14 * local_lock - Acquire a per CPU local lock
15 * @lock: The lock variable
16 */
17#define local_lock(lock) __local_lock(this_cpu_ptr(lock))
18
19/**
20 * local_lock_irq - Acquire a per CPU local lock and disable interrupts
21 * @lock: The lock variable
22 */
23#define local_lock_irq(lock) __local_lock_irq(this_cpu_ptr(lock))
24
25/**
26 * local_lock_irqsave - Acquire a per CPU local lock, save and disable
27 * interrupts
28 * @lock: The lock variable
29 * @flags: Storage for interrupt flags
30 */
31#define local_lock_irqsave(lock, flags) \
32 __local_lock_irqsave(this_cpu_ptr(lock), flags)
33
34/**
35 * local_unlock - Release a per CPU local lock
36 * @lock: The lock variable
37 */
38#define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
39
40/**
41 * local_unlock_irq - Release a per CPU local lock and enable interrupts
42 * @lock: The lock variable
43 */
44#define local_unlock_irq(lock) __local_unlock_irq(this_cpu_ptr(lock))
45
46/**
47 * local_unlock_irqrestore - Release a per CPU local lock and restore
48 * interrupt flags
49 * @lock: The lock variable
50 * @flags: Interrupt flags to restore
51 */
52#define local_unlock_irqrestore(lock, flags) \
53 __local_unlock_irqrestore(this_cpu_ptr(lock), flags)
54
55/**
56 * local_trylock_init - Runtime initialize a lock instance
57 * @lock: The lock variable
58 */
59#define local_trylock_init(lock) __local_trylock_init(lock)
60
61/**
62 * local_trylock - Try to acquire a per CPU local lock
63 * @lock: The lock variable
64 *
65 * The function can be used in any context such as NMI or HARDIRQ. Due to
66 * locking constrains it will _always_ fail to acquire the lock in NMI or
67 * HARDIRQ context on PREEMPT_RT.
68 */
69#define local_trylock(lock) __local_trylock(this_cpu_ptr(lock))
70
71#define local_lock_is_locked(lock) __local_lock_is_locked(lock)
72
73/**
74 * local_trylock_irqsave - Try to acquire a per CPU local lock, save and disable
75 * interrupts if acquired
76 * @lock: The lock variable
77 * @flags: Storage for interrupt flags
78 *
79 * The function can be used in any context such as NMI or HARDIRQ. Due to
80 * locking constrains it will _always_ fail to acquire the lock in NMI or
81 * HARDIRQ context on PREEMPT_RT.
82 */
83#define local_trylock_irqsave(lock, flags) \
84 __local_trylock_irqsave(this_cpu_ptr(lock), flags)
85
86DEFINE_GUARD(local_lock, local_lock_t __percpu*,
87 local_lock(_T),
88 local_unlock(_T))
89DEFINE_GUARD(local_lock_irq, local_lock_t __percpu*,
90 local_lock_irq(_T),
91 local_unlock_irq(_T))
92DEFINE_LOCK_GUARD_1(local_lock_irqsave, local_lock_t __percpu,
93 local_lock_irqsave(_T->lock, _T->flags),
94 local_unlock_irqrestore(_T->lock, _T->flags),
95 unsigned long flags)
96
97#define local_lock_nested_bh(_lock) \
98 __local_lock_nested_bh(this_cpu_ptr(_lock))
99
100#define local_unlock_nested_bh(_lock) \
101 __local_unlock_nested_bh(this_cpu_ptr(_lock))
102
103DEFINE_GUARD(local_lock_nested_bh, local_lock_t __percpu*,
104 local_lock_nested_bh(_T),
105 local_unlock_nested_bh(_T))
106
107#endif
108

source code of linux/include/linux/local_lock.h