Re: [PATCH 4/5] atomic: dec_and_lock use cmpxchg

[Nick Piggin]

David S. Miller wrote:

> I talked to Linus about my patch and he made the good point that the
> Alpha optimization is very valid (it avoids loading the GP and other
> stuff by doing that fancy assembler entry point).  So we decided that
> we'd make the cmpxchg() generic version, but make moving over to that
> gradual instead of mandatorily forcing everyone to use the new thing.
>
> So, for example, we'd convert sparc64 (because I want to) and the
> architectures using the exact same ppc64 C code, but leave the others
> alone.  It'd be up to the remaining platform's maintainers to move
> over if they wanted to.
>
> I'll submit that updated patch to him later today.

OK that's fair enough. I'll submit whatever cleanups are possible
on top of your patch after the atomic_cmpxchg patch goes in (if
it goes in). Thanks.

--
SUSE Labs, Novell Inc.

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