Re: [PATCH 2/3] percpu counter: cast this_cpu_sub() adjustment

[Tejun Heo]

On Sun, Oct 27, 2013 at 05:04:29AM -0700, Andrew Morton wrote:
> On Sun, 27 Oct 2013 07:22:55 -0400 Tejun Heo <tj@xxxxxxxxxx> wrote:
> 
> > We probably want to cc stable for this and the next one.  How should
> > these be routed?  I can take these through percpu tree or mm works
> > too.  Either way, it'd be best to route them together.
> 
> Yes, all three look like -stable material to me.  I'll grab them later
> in the week if you haven't ;)

Tried to apply to percpu but the third one is a fix for a patch which
was added to -mm during v3.12-rc1, so these are yours. :)

> The names of the first two patches distress me.  They rather clearly
> assert that the code affects percpu_counter.[ch], but that is not the case. 
> Massaging is needed to fix that up.

Yeah, something like the following would be better

 percpu: add test module for various percpu operations
 percpu: fix this_cpu_sub() subtrahend casting for unsigneds
 memcg: use __this_cpu_sub() to dec stats to avoid incorrect subtrahend casting

Thanks.

-- 
tejun
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