[RFC] arm: Add for atomic half word exchange

[Arnd Bergmann]

On Friday 05 June 2015 01:17:13 Sarbojit Ganguly wrote:
> Since the compilation is also a success for CONFIG_CPU_V6 with the patch,
> I think we're good to go.

I'm not following your logic. Did you create a new patch that addresses
compilation with CONFIG_CPU_V6?

The original patch should cause a compile error on v6, if it does not,
you either have a broken assembler or you forgot to enable the code
that uses these instructions. Neither of them would be a reason to
merge the patch. Please explain what is going on.

	Arnd