Re: [Xen-devel] [PATCH for-4.6] xen/public: arm: Use __typeof__ rather than typeof

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.10.15 at 16:48, <ian.campbell@xxxxxxxxxx> wrote:
> Perhaps this needs to be explicitly asked then, So, given:
> #define set_xen_guest_handle_raw(hnd, val)                  \
>     do {                                                    \
>         typeof(&(hnd)) _sxghr_tmp = &(hnd);                 \
>         _sxghr_tmp->q = 0;                                  \
>         _sxghr_tmp->p = val;                                \
>     } while ( 0 )
> 
> where typeof is used to avoid the multiple evaluations of hnd which
> assigning to hnd.q and hnd.p would involve, is there some way to do the
> same in pure ANSI C?

As per Julien's earlier reply, perhaps the x86 way is usable for arm
after all.

Jan


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