Re: [Xen-devel] [PATCH v3 03/13] xen: introduce cpumask_from_bitmap

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 25/04/2013 11:01, "Ian Campbell" <Ian.Campbell@xxxxxxxxxx> wrote:

>> And most importantly: Why? This isn't an operation that should
>> commonly be done, and hence having a utility function for this
>> seems to invite for abuse rather than really help.
> 
> I suggested it, we are emulating an instruction which provides a bitmap
> of the CPUs to operate on. It seemed nicer to me to have a helper rather
> than to open-code accesses under the hood of the cpumask interface.

Emulating a guest instruction? And it really wants to act on sets of real
physical cpus (hence cpumask_t)?

 -- Keir



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