asm-generic/bitops/instrumented-non-atomic.h

1 /* SPDX-License-Identifier: GPL-2.0 */
4  * This file provides wrappers with sanitizer instrumentation for non-atomic
17  * ___set_bit - Set a bit in memory
21  * Unlike set_bit(), this function is non-atomic. If it is called on the same
26 ___set_bit(unsigned long nr, volatile unsigned long *addr)  in ___set_bit()
33  * ___clear_bit - Clears a bit in memory
37  * Unlike clear_bit(), this function is non-atomic. If it is called on the same
42 ___clear_bit(unsigned long nr, volatile unsigned long *addr)  in ___clear_bit()
49  * ___change_bit - Toggle a bit in memory
53  * Unlike change_bit(), this function is non-atomic. If it is called on the same
58 ___change_bit(unsigned long nr, volatile unsigned long *addr)  in ___change_bit()
64 static __always_inline void __instrument_read_write_bitop(long nr, volatile unsigned long *addr)  in __instrument_read_write_bitop()
68 		 * We treat non-atomic read-write bitops a little more special.  in __instrument_read_write_bitop()
70 		 * non-atomicity of the writer is sufficient may be reasonable  in __instrument_read_write_bitop()
72 		 * assume-plain-writes-atomic rule):  in __instrument_read_write_bitop()
73 		 * 1. report read-modify-write races -> check read;  in __instrument_read_write_bitop()
75 		 *    races with unmarked readers -> check "atomic" write.  in __instrument_read_write_bitop()
89  * ___test_and_set_bit - Set a bit and return its old value
93  * This operation is non-atomic. If two instances of this operation race, one
97 ___test_and_set_bit(unsigned long nr, volatile unsigned long *addr)  in ___test_and_set_bit()
104  * ___test_and_clear_bit - Clear a bit and return its old value
108  * This operation is non-atomic. If two instances of this operation race, one
112 ___test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)  in ___test_and_clear_bit()
119  * ___test_and_change_bit - Change a bit and return its old value
123  * This operation is non-atomic. If two instances of this operation race, one
127 ___test_and_change_bit(unsigned long nr, volatile unsigned long *addr)  in ___test_and_change_bit()
134  * _test_bit - Determine whether a bit is set
139 _test_bit(unsigned long nr, const volatile unsigned long *addr)  in _test_bit()
146  * _test_bit_acquire - Determine, with acquire semantics, whether a bit is set
151 _test_bit_acquire(unsigned long nr, const volatile unsigned long *addr)  in _test_bit_acquire()