rcu: Clarify and correct the rcu_preempt_qs() header comment

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The rcu_preempt_qs() function only applies to the CPU, not the task.
A task really is allowed to invoke this function while in an RCU-preempt
read-side critical section, but only if it has first added itself to
some leaf rcu_node structure's ->blkd_tasks list.

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

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Paul E. McKenney 2018-05-16 18:00:17 -07:00

parent 3b57a3994f

commit c7037ff524

1 changed files with 10 additions and 6 deletions

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kernel/rcu/tree_plugin.h

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