Re: [PATCH] smp: Remove CSD_FLAG_WAIT flag that's unused

[Peter Zijlstra]

On Fri, Feb 27, 2015 at 12:36:13PM -0800, Tim Chen wrote:
> 
> The CSD_FLAG_WAIT is not serving any useful purpose as we do not use
> its value to decide if we are going to wait for a smp call to complete.
> We also never cleared it properly when we are done waiting to indicate
> that the wait is over.  So the WARNING debug check in csd_unlock is
> also not serving useful purpose.  Propose here to remove it to clean up
> the code.

Linus had a much more comprehensive patch:

  http://marc.info/?l=linux-kernel&m=142368734118230
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