[RFC PATCH 0/5] Fix Thumb-2 undef handling for mixed-arch kernels

[Tixy]

On Wed, 2011-08-10 at 11:13 +0100, Dave Martin wrote:
> As a side-effect, this also changes cpu_architecture from a
> function into a global variable initialised at boot-time, which is
> probably a sensible idea anyway.

One possible pitfall of this is if the variable didn't get set up before
it's first use. I have looked at all the uses and this doesn't seem to
be a problem though.

An alternative to defend against this is to make cpu_architecture() an
inline function returning the value of the global variable like:

inline int cpu_architecture(void)
{
	BUG_ON(the_cpu_architecture == CPU_ARCH_UNKNOWN);
	return the_cpu_architecture;
}

This has the bonus of not needing to change users of the the function.

-- 
Tixy