rcu: Add WRITE_ONCE() to rcu_node ->qsmask update

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The rcu_node structure's ->qsmask 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>

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Paul E. McKenney 2020-01-03 11:38:51 -08:00

parent 8a7e8f5171

commit 7672d647dd

1 changed files with 1 additions and 1 deletions

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kernel/rcu/tree.c

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