[PATCH v2] ARM: Define wfi() macro for v6 processors

[Dave Martin]

> > On Tue, Feb 08, 2011 at 11:01:25AM +0000, Dave Martin wrote:
> > > For v6, wfi is architected as a defined MCR instruction, so
> > > use that definition.

[...]

On Tue, Feb 08, 2011 at 01:11:51PM +0100, Arnd Bergmann wrote:
> I don't see any users of the sev/wfe/wfi macros in the current kernel,
> so removing them seems like a good strategy to avoid people from
> using them incorrectly.
> 
> If the definitions differ between v5/v6/v7 CPUs, any common code
> using them would need to do either binary patching of some sort
> or abstract the difference between the CPU in some other way.
> 
> Dave, what code do you have in mind as a possible user?

The OMAP BSP has its own version of this, which I'm suggesting
to port to the more generic macros in system.h, now that they
exist.

---Dave