[RFC PATCH] arm: asm/cmpxchg.h: Add support half-word xchg()

[Russell King - ARM Linux]

On Wed, Feb 25, 2015 at 12:34:35PM -0500, Pranith Kumar wrote:
> On Wed, Feb 25, 2015 at 12:14 PM, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> > Actually, I think we ought to get rid of __bad_xchg() so that cases
> > like this cause a link error instead of a runtime error, just like we
> > do in other cases as well.
> >
> > That's something that goes back ages (it used to be called something
> > like invalidptr in 2.0 kernels...)
> 
> That sounds like a good idea. I will cook up a patch doing this.

I've just removed it on my build system's tree, and we'll see tomorrow
morning how it fairs.  If it spits out a lot of errors, we won't be
able to remove it.

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