kcsan: Address missing case with KCSAN_REPORT_VALUE_CHANGE_ONLY

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Even with KCSAN_REPORT_VALUE_CHANGE_ONLY, KCSAN still reports data
races between reads and watchpointed writes, even if the writes wrote
values already present.  This commit causes KCSAN to unconditionally
skip reporting in this case.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Marco Elver 2020-01-29 16:01:02 +01:00 • committed by Ingo Molnar

parent f1bc96210c

commit ad4f8eeca8

1 changed files with 20 additions and 7 deletions

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kernel/kcsan/report.c

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