instrumented.h: Introduce read-write instrumentation hooks

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Introduce read-write instrumentation hooks, to more precisely denote an
operation's behaviour.

KCSAN is able to distinguish compound instrumentation, and with the new
instrumentation we then benefit from improved reporting. More
importantly, read-write compound operations should not implicitly be
treated as atomic, if they aren't actually atomic.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Marco Elver 2020-07-24 09:00:06 +02:00 • committed by Paul E. McKenney

parent bec4a24748

commit 00047c2e6d

1 changed files with 30 additions and 0 deletions

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include/linux/instrumented.h

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