[PATCH] um: "borrow" cmpxchg from x86 tree in UML

[Johannes Berg]

On Fri, 2020-11-13 at 13:48 +0000, Anton Ivanov wrote:
> 
> I think that was it. Or to be more exact, I hope that was it.
> 
> I went a few times through asm-generic and that looks like all the
> bits which are worth implementing for a uniprocessor architecture as a
> replacement for their generic equivalents.

It seems that word-at-a-time.h with CONFIG_DCACHE_WORD_ACCESS might 
be worthwhile as well?

Also perhaps bug.h; there are a lot of BUG_ON/WARN_ON and similar
things, and especially the _ONCE part looks better there?

ftrace is probably not worth the effort ...

johannes