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kcsan: Add docbook header for data_race()

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Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
This commit is contained in:
Paul E. McKenney 2020-02-03 14:42:18 -08:00 committed by Ingo Molnar
parent 76d6f06c36
commit 7ad900d35b
1 changed files with 8 additions and 6 deletions
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14
include/linux/compiler.h
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@ -315,13 +315,15 @@ unsigned long read_word_at_a_time(const void *addr)
#include <linux/kcsan.h>
/*
* data_race(): macro to document that accesses in an expression may conflict with
* other concurrent accesses resulting in data races, but the resulting
* behaviour is deemed safe regardless.
/**
* data_race - mark an expression as containing intentional data races
*
* This macro *does not* affect normal code generation, but is a hint to tooling
* that data races here should be ignored.
* This data_race() macro is useful for situations in which data races
* should be forgiven. One example is diagnostic code that accesses
* shared variables but is not a part of the core synchronization design.
*
* This macro *does not* affect normal code generation, but is a hint
* to tooling that data races here are to be ignored.
*/
#define data_race(expr) \
({ \