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kcsan: Add pointer to access-marking.txt to data_race() bullet

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This commit references tools/memory-model/Documentation/access-marking.txt
in the bullet introducing data_race().  The access-marking.txt file
gives advice on when data_race() should and should not be used.

Suggested-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney
2021-03-04 16:04:09 -08:00
parent 976aac5f88
commit ea0484644e
1 changed files with 3 additions and 1 deletions
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4
Documentation/dev-tools/kcsan.rst
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@@ -106,7 +106,9 @@ the below options are available:
* KCSAN understands the ``data_race(expr)`` annotation, which tells KCSAN that * KCSAN understands the ``data_race(expr)`` annotation, which tells KCSAN that
any data races due to accesses in ``expr`` should be ignored and resulting any data races due to accesses in ``expr`` should be ignored and resulting
behaviour when encountering a data race is deemed safe. behaviour when encountering a data race is deemed safe. Please see
``tools/memory-model/Documentation/access-marking.txt`` in the kernel source
tree for more information.
* Disabling data race detection for entire functions can be accomplished by * Disabling data race detection for entire functions can be accomplished by
using the function attribute ``__no_kcsan``:: using the function attribute ``__no_kcsan``::