srcu: Fix __call_srcu()/process_srcu() datarace

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The srcu_node structure's ->srcu_gp_seq_needed_exp field is accessed
locklessly, so updates must use WRITE_ONCE().  This commit therefore
adds the needed WRITE_ONCE() invocations.

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 2019-12-22 19:32:54 -08:00

parent bb6d3fb354

commit 7ff8b4502b

1 changed files with 2 additions and 2 deletions

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kernel/rcu/srcutree.c

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