1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2
3 /*
4 * This file provides wrappers with sanitizer
5 * operations.
6 *
7 * To use this functionality, an arch's bitops
8 * the below bit operations with an arch_ pref
9 * arch___set_bit(), etc.).
10 */
11 #ifndef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMI
12 #define _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMI
13
14 #include <linux/instrumented.h>
15
16 /**
17 * set_bit - Atomically set a bit in memory
18 * @nr: the bit to set
19 * @addr: the address to start counting from
20 *
21 * This is a relaxed atomic operation (no impl
22 *
23 * Note that @nr may be almost arbitrarily lar
24 * restricted to acting on a single-word quant
25 */
26 static __always_inline void set_bit(long nr, v
27 {
28 instrument_atomic_write(addr + BIT_WOR
29 arch_set_bit(nr, addr);
30 }
31
32 /**
33 * clear_bit - Clears a bit in memory
34 * @nr: Bit to clear
35 * @addr: Address to start counting from
36 *
37 * This is a relaxed atomic operation (no impl
38 */
39 static __always_inline void clear_bit(long nr,
40 {
41 instrument_atomic_write(addr + BIT_WOR
42 arch_clear_bit(nr, addr);
43 }
44
45 /**
46 * change_bit - Toggle a bit in memory
47 * @nr: Bit to change
48 * @addr: Address to start counting from
49 *
50 * This is a relaxed atomic operation (no impl
51 *
52 * Note that @nr may be almost arbitrarily lar
53 * restricted to acting on a single-word quant
54 */
55 static __always_inline void change_bit(long nr
56 {
57 instrument_atomic_write(addr + BIT_WOR
58 arch_change_bit(nr, addr);
59 }
60
61 /**
62 * test_and_set_bit - Set a bit and return its
63 * @nr: Bit to set
64 * @addr: Address to count from
65 *
66 * This is an atomic fully-ordered operation (
67 */
68 static __always_inline bool test_and_set_bit(l
69 {
70 kcsan_mb();
71 instrument_atomic_read_write(addr + BI
72 return arch_test_and_set_bit(nr, addr)
73 }
74
75 /**
76 * test_and_clear_bit - Clear a bit and return
77 * @nr: Bit to clear
78 * @addr: Address to count from
79 *
80 * This is an atomic fully-ordered operation (
81 */
82 static __always_inline bool test_and_clear_bit
83 {
84 kcsan_mb();
85 instrument_atomic_read_write(addr + BI
86 return arch_test_and_clear_bit(nr, add
87 }
88
89 /**
90 * test_and_change_bit - Change a bit and retu
91 * @nr: Bit to change
92 * @addr: Address to count from
93 *
94 * This is an atomic fully-ordered operation (
95 */
96 static __always_inline bool test_and_change_bi
97 {
98 kcsan_mb();
99 instrument_atomic_read_write(addr + BI
100 return arch_test_and_change_bit(nr, ad
101 }
102
103 #endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_NON
104
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