Paul E. McKenney 0050c7b2d2 locking/rtmutex: rcu: Add WRITE_ONCE() to rt_mutex ->owner ...

The rt_mutex structure's ->owner field is read locklessly, so this
commit adds the WRITE_ONCE() to an update in order to provide proper
documentation and READ_ONCE()/WRITE_ONCE() pairing.

This data race was reported by KCSAN.  Not appropriate for backporting
due to failure being unlikely.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>

2020-02-20 15:58:22 -08:00

51 KiB

Raw Blame History

View Raw