[RFC PATCH v2 3/5] ARM: kernel: update cpu_suspend code to use cache LoUIS operations

[Will Deacon]

On Tue, Dec 11, 2012 at 05:07:35PM +0000, Guennadi Liakhovetski wrote:
> Hi Will
> 
> On Tue, 11 Dec 2012, Will Deacon wrote:
> 
> > On Tue, Dec 11, 2012 at 04:33:13PM +0000, Will Deacon wrote:
> > > On Tue, Dec 11, 2012 at 04:07:56PM +0000, Guennadi Liakhovetski wrote:
> > > > Git bisect identified this patch, in the mainline as
> > > > 
> > > > commit dbee0c6fb4c1269b2dfc8b0b7a29907ea7fed560
> > > > Author: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
> > > > Date:   Fri Sep 7 11:06:57 2012 +0530
> > > > 
> > > >     ARM: kernel: update cpu_suspend code to use cache LoUIS operations
> > > > 
> > > > as the culprit of the broken wake up from STR on mackerel, based on an 
> > > > sh7372 A8 SoC. .config attached.
> > > 
> > > My guess is that because Cortex-A8 does not implement the MP extensions,
> > > the LoUIS field of the CLIDR reads as zero, and the cache isn't flushed at
> > > all (I can see an early exit in v7_flush_dcache_louis).
> > > 
> > > Lorenzo -- how is this supposed to work for uniprocessor CPUs?
> > 
> > Bah, forgot to ask you if the following patch helps...
> 
> Yes, it does.

Cracking, can I add you tested-by please?

Will