[CFT] Always enable SMP mode on MP capable CPUs

[Russell King - ARM Linux]

On Thu, May 25, 2017 at 08:11:03AM -0700, Tony Lindgren wrote:
> * Russell King - ARM Linux <linux at armlinux.org.uk> [170525 07:51]:
> > On Wed, May 24, 2017 at 08:38:47AM -0700, Tony Lindgren wrote:
> > > * Russell King - ARM Linux <linux at armlinux.org.uk> [170519 10:19]:
> > > > We could expand the table to positively identify the SMP capable CPUs
> > > > and enable the SMP bit there, but it's going to add a lot of entries
> > > > there (one for each specific ARMv7 MP CPU) and is going to have to be
> > > > endlessly added to each time a new SMP CPU comes out.
> > > 
> > > Looks like commit e414690faa81 ("ARM: always enable SMP mode on SMP cores")
> > > causes booting to fail early at least on omap4430 duovero. It's a bit of
> > > a mystery as it is SMP.. And pandboard es (4460) and droid 4 (4430) work
> > > without the conditional write..
> > > 
> > > Partial revert like below seems to make it boot again.
> > 
> > Thanks for testing, I'll integrate your change, and it should be in
> > tonight's linux-next.
> 
> OK. That may not work on am437x though as it's UP.

Maybe this is just too complicated to grasp - in which case just test
tonight's linux-next on *all* your boards irrespective of the CPU, and
let me know if there's a regression due to this patch, giving me full
details of your CPUs (CPU ID numbers, number of CPUs, etc.)  If no one
reports a regression that doesn't get fixed, I'll merge it during the
next merge window.

(I can't believe that this is proving to be soo complicated...)

-- 
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