Re: arm: pxa: CPU_PXA27x?

[Robert Jarzmik <robert.jarzmik@free.fr>]

Paul Bolle <pebolle@tiscali.nl> writes:

> Robert,
>
> Your commit 03ec7fe70c5c ("arm: pxa: add pxa27x device-tree support") is
> included in today's linux-next (ie, next-20141121). It adds a select
> statement for CPU_PXA27x. But there's no Kconfig symbol CPU_PXA27x.
Ah yes, you're perfectly right, CPU_PXA27x was not the one, it was PXA27x, sic
..

>
> Why is that select needed? For what it's worth: __cpu_is_pxa27x()
> compiles to something interesting if CONFIG_PXA27x is defined.
You mean "is not defined", right ?

That (CONFIG_PXA27x) select is needed because without it the arm cpu
architecture is not selected, ie. CONFIG_CPU_XSCALE is not set. And this in turn
is needed to choose the basic arm operations like TLB handling, cache handling,
etc ... You cannot compile a single platform kernel without this.

As a poor excuse, I hadn't seen this because this resulted from a poor merge
resolution which brought in both "select PXA27x" and "select CPU_PXA27x".

> In https://lkml.org/lkml/2014/9/30/578 I proposed a patch that emits a
> warning in cases like this. Like _all_ Kconfig related patches I've seen
> flying by lately it appears to be dropped in /dev/null. What's going on?
For that one I don't know.

Ah, and yes I'll send an update patch to remove the "select CPU_PXA27x", thanks
for noticing this.

Cheers.

-- 
Robert