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

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On Tue, Feb 08, 2011 at 11:01:25AM +0000, Dave Martin wrote:

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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