workqueue: Remove the cacheline_aligned for nr_running
nr_running is never modified remotely after the schedule callback in wakeup path is removed. Rather nr_running is often accessed with other fields in the pool together, so the cacheline_aligned for nr_running isn't needed. Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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