ARM: smp: why don't eliminate warning "Unknown IPI message 0x1"?

On Tue, Sep 18, 2012 at 04:07:49PM +0800, ??? wrote:

Russell King want people to move to SGI0 for this, so that we can have SGI1-N
as the proper IPIs, but now we can't do this, maybe we must wait for
so many years.
But, Do you think we can use a another way to resolve this problem,
because this warning message will oftenly appeare in products.

We can't assume the fixed IPI number that can wakeup secondary cores.
"I'd much rather see platforms deciding whether they need to use SGI1
or whether they can switch to SGI0 instead."

Why not just fix your platform to use SGI0.  I think we're _finally_
there with everyone using SGI0, which means we can commit the patch
which fixes this.

And anyway, how many of your customers read your kernel log messages?