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    SubjectRe: [PATCH, RFC] reimplement flush_workqueue()
    On Thu, Jan 04, 2007 at 10:31:07AM -0800, Andrew Morton wrote:
    > But before we do much more of this we should have a wrapper. Umm
    > static inline void block_cpu_hotplug(void)
    > {
    > preempt_disable();
    > }


    This will only block cpu down, not cpu_up and hence is a misnomer. I would be
    vary of ignoring cpu_up events totally in writing hotplug safe code.

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