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authorJoel Fernandes (Google) <joel@joelfernandes.org>2022-09-17 19:41:58 +0300
committerPaul E. McKenney <paulmck@kernel.org>2022-10-19 00:59:57 +0300
commitaba9645bd10bd9f793732b06495b1312ee44865e (patch)
tree00b6009b63c84f16c3f25cdc8322ca91861fa8ba /include
parentb5ad0d2e8832c770b3ff2887ae37b47f42a3ab82 (diff)
downloadlinux-aba9645bd10bd9f793732b06495b1312ee44865e.tar.xz
rcu: Use READ_ONCE() for lockless read of rnp->qsmask
The rnp->qsmask is locklessly accessed from rcutree_dying_cpu(). This may help avoid load tearing due to concurrent access, KCSAN issues, and preserve sanity of people reading the mask in tracing. Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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