workqueue: Replace call_rcu_sched() with call_rcu()
Now that call_rcu()'s callback is not invoked until after all preempt-disable regions of code have completed (in addition to explicitly marked RCU read-side critical sections), call_rcu() can be used in place of call_rcu_sched(). This commit therefore makes that change. Signed-off-by: NPaul E. McKenney <paulmck@linux.ibm.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Acked-by: NTejun Heo <tj@kernel.org>
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