rcu: Fix comment about _rcu_barrier()/orphanage exclusion

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In the old days, _rcu_barrier() acquired ->onofflock to exclude
rcu_send_cbs_to_orphanage(), which allowed the latter to avoid memory
barriers in callback handling.  However, _rcu_barrier() recently started
doing get_online_cpus() to lock out CPU-hotplug operations entirely, which
means that the comment in rcu_send_cbs_to_orphanage() that talks about
->onofflock is now obsolete.  This commit therefore fixes the comment.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2012-09-20 16:59:47 -07:00 • committed by Paul E. McKenney

parent 6f0c0580b7

commit abfd6e58ae

1 changed files with 2 additions and 2 deletions

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kernel/rcutree.c

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