forked from luck/tmp_suning_uos_patched
28 lines
890 B
C
28 lines
890 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _KERNEL_KCSAN_ATOMIC_H
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#define _KERNEL_KCSAN_ATOMIC_H
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#include <linux/jiffies.h>
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/*
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* Helper that returns true if access to ptr should be considered as an atomic
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* access, even though it is not explicitly atomic.
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*
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* List all volatile globals that have been observed in races, to suppress
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* data race reports between accesses to these variables.
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*
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* For now, we assume that volatile accesses of globals are as strong as atomic
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* accesses (READ_ONCE, WRITE_ONCE cast to volatile). The situation is still not
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* entirely clear, as on some architectures (Alpha) READ_ONCE/WRITE_ONCE do more
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* than cast to volatile. Eventually, we hope to be able to remove this
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* function.
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*/
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static inline bool kcsan_is_atomic(const volatile void *ptr)
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{
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/* only jiffies for now */
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return ptr == &jiffies;
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}
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#endif /* _KERNEL_KCSAN_ATOMIC_H */
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