Re: [this_cpu_xx V7 0/8] Per cpu atomics in core allocators andcleanup

[Christoph Lameter]

> However, I would need:
>
> this_cpu_cmpxchg(scalar, oldv, newv)
>   (maps to x86 cmpxchg)
>
> this_cpu_add_return(scalar, value)
>   (maps to x86 xadd)
>
> too. Is that a planned addition ?

It was not necessary. Its easy to add though.

> (while we are at it, we might as will add the xchg instruction,
> althrough it has an implied LOCK prefix on x86).

Well yeah thats a thorny one. One could use the cmpxchg instead?

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