Re: [PATCH v2] x86: xen: remove the use of VLAIS

[Boris Ostrovsky]

On 01/06/2018 04:39 PM, Nick Desaulniers wrote:
> Variable Length Arrays In Structs (VLAIS) is not supported by Clang, and
> frowned upon by others.
>
> https://lkml.org/lkml/2013/9/23/500
>
> Here, the VLAIS was used because the size of the bitmap returned from
> xen_mc_entry() depended on possibly (based on kernel configuration)
> runtime sized data. Rather than declaring args as a VLAIS then calling
> sizeof on *args, we calculate the appropriate sizeof args manually.
> Further, we can get rid of the #ifdef's and rely on num_possible_cpus()
> (thanks to a helpful checkpatch warning from an earlier version of this
> patch).
>
> Suggested-by: Juergen Gross <jgross@xxxxxxxx>
> Signed-off-by: Nick Desaulniers <nick.desaulniers@xxxxxxxxx>

Applied to for-linus-4.15.

-boris