[PATCH 1/1] [RFCv2] arm: add half-word __xchg

[Russell King - ARM Linux]

On Sun, Mar 28, 2010 at 12:14:29AM +0000, Jamie Lokier wrote:
> But seeing as this is for ARM only at present, I'd just change the
> types to u32 and be done with it.  It does seem like a good thing to
> go to asm-generic eventually though.

Which is why having it use __alignof__ now would be a good idea - it
avoids someone blindly copying the code and then there being a subtle
bug in it.

I was wondering if a generic PTR_ALIGN(type, ptr) macro would be a
good idea too.