workqueue: Clarify that schedule_on_each_cpu is synchronous
The documentation for schedule_on_each_cpu() states that it calls a function on each online CPU from keventd. This can easily be interpreted as an asyncronous call because the description does not mention that flush_work is called. Clarify that it is synchronous. tj: rephrased a bit Signed-off-by: NMel Gorman <mel@csn.ul.ie> Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: NTejun Heo <tj@kernel.org>
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