rcu: Add READ_ONCE and data_race() to rcu_node ->boost_tasks

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The rcu_node structure's ->boost_tasks field is read locklessly, so this
commit adds the READ_ONCE() to one load in order to avoid destructive
compiler optimizations.  The other load is from a diagnostic print,
so data_race() suffices.

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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This commit is contained in:

Paul E. McKenney 2020-01-03 15:22:01 -08:00

parent 314eeb43e5

commit 065a6db12a

1 changed files with 3 additions and 2 deletions

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kernel/rcu/tree_plugin.h

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