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100 lines
2.9 KiB
100 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* This file provides wrappers with sanitizer instrumentation for atomic bit |
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* operations. |
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* |
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* To use this functionality, an arch's bitops.h file needs to define each of |
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* the below bit operations with an arch_ prefix (e.g. arch_set_bit(), |
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* arch___set_bit(), etc.). |
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*/ |
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#ifndef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H |
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#define _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H |
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#include <linux/instrumented.h> |
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/** |
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* set_bit - Atomically set a bit in memory |
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* @nr: the bit to set |
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* @addr: the address to start counting from |
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* |
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* This is a relaxed atomic operation (no implied memory barriers). |
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* |
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* Note that @nr may be almost arbitrarily large; this function is not |
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* restricted to acting on a single-word quantity. |
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*/ |
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static inline void set_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); |
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arch_set_bit(nr, addr); |
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} |
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/** |
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* clear_bit - Clears a bit in memory |
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* @nr: Bit to clear |
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* @addr: Address to start counting from |
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* |
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* This is a relaxed atomic operation (no implied memory barriers). |
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*/ |
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static inline void clear_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); |
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arch_clear_bit(nr, addr); |
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} |
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/** |
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* change_bit - Toggle a bit in memory |
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* @nr: Bit to change |
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* @addr: Address to start counting from |
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* |
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* This is a relaxed atomic operation (no implied memory barriers). |
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* |
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* Note that @nr may be almost arbitrarily large; this function is not |
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* restricted to acting on a single-word quantity. |
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*/ |
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static inline void change_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); |
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arch_change_bit(nr, addr); |
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} |
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/** |
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* test_and_set_bit - Set a bit and return its old value |
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* @nr: Bit to set |
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* @addr: Address to count from |
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* |
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* This is an atomic fully-ordered operation (implied full memory barrier). |
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*/ |
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static inline bool test_and_set_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); |
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return arch_test_and_set_bit(nr, addr); |
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} |
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/** |
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* test_and_clear_bit - Clear a bit and return its old value |
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* @nr: Bit to clear |
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* @addr: Address to count from |
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* |
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* This is an atomic fully-ordered operation (implied full memory barrier). |
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*/ |
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static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); |
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return arch_test_and_clear_bit(nr, addr); |
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} |
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/** |
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* test_and_change_bit - Change a bit and return its old value |
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* @nr: Bit to change |
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* @addr: Address to count from |
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* |
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* This is an atomic fully-ordered operation (implied full memory barrier). |
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*/ |
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static inline bool test_and_change_bit(long nr, volatile unsigned long *addr) |
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{ |
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instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); |
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return arch_test_and_change_bit(nr, addr); |
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} |
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#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H */
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