Hello,

On Wed, Jul 22, 2015 at 08:28:39AM +0800, Baoquan He wrote:
> I know this change makes code longer. PCPU_MAP_BUSY is better, I am gonna
> repost with it.

While at it, can you also please add comment on top of the definition
of PCPU_MAP_BUSY explaining what's going on?

Thanks.

-- 
tejun
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