aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-generic/bitops/instrumented-atomic.h
blob: fb2cb33a40138100afc777874c30528a224d8861 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
/* SPDX-License-Identifier: GPL-2.0 */

/*
 * This file provides wrappers with sanitizer instrumentation for atomic bit
 * operations.
 *
 * To use this functionality, an arch's bitops.h file needs to define each of
 * the below bit operations with an arch_ prefix (e.g. arch_set_bit(),
 * arch___set_bit(), etc.).
 */
#ifndef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H
#define _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H

#include <linux/instrumented.h>

/**
 * set_bit - Atomically set a bit in memory
 * @nr: the bit to set
 * @addr: the address to start counting from
 *
 * This is a relaxed atomic operation (no implied memory barriers).
 *
 * Note that @nr may be almost arbitrarily large; this function is not
 * restricted to acting on a single-word quantity.
 */
static inline void set_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	arch_set_bit(nr, addr);
}

/**
 * clear_bit - Clears a bit in memory
 * @nr: Bit to clear
 * @addr: Address to start counting from
 *
 * This is a relaxed atomic operation (no implied memory barriers).
 */
static inline void clear_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	arch_clear_bit(nr, addr);
}

/**
 * change_bit - Toggle a bit in memory
 * @nr: Bit to change
 * @addr: Address to start counting from
 *
 * This is a relaxed atomic operation (no implied memory barriers).
 *
 * Note that @nr may be almost arbitrarily large; this function is not
 * restricted to acting on a single-word quantity.
 */
static inline void change_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	arch_change_bit(nr, addr);
}

/**
 * test_and_set_bit - Set a bit and return its old value
 * @nr: Bit to set
 * @addr: Address to count from
 *
 * This is an atomic fully-ordered operation (implied full memory barrier).
 */
static inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	return arch_test_and_set_bit(nr, addr);
}

/**
 * test_and_clear_bit - Clear a bit and return its old value
 * @nr: Bit to clear
 * @addr: Address to count from
 *
 * This is an atomic fully-ordered operation (implied full memory barrier).
 */
static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	return arch_test_and_clear_bit(nr, addr);
}

/**
 * test_and_change_bit - Change a bit and return its old value
 * @nr: Bit to change
 * @addr: Address to count from
 *
 * This is an atomic fully-ordered operation (implied full memory barrier).
 */
static inline bool test_and_change_bit(long nr, volatile unsigned long *addr)
{
	instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
	return arch_test_and_change_bit(nr, addr);
}

#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H */

Privacy Policy