Re: [PATCH] kvm/emulate: fix a -Werror=cast-function-type

[Sean Christopherson]

On Fri, Feb 14, 2020 at 08:33:50PM +0100, Paolo Bonzini wrote:
> On 14/02/20 20:14, Qian Cai wrote:
> >> It seems misguided to define a local variable just to get an implicit
> >> cast from (void *) to (fastop_t). Sean's first suggestion gives you
> >> the same implicit cast without the local variable. The second
> >> suggestion makes both casts explicit.
> > 
> > OK, I'll do a v2 using the first suggestion which looks simpler once it passed
> > compilations.
> > 
> 
> Another interesting possibility is to use an unnamed union of a
> (*execute) function pointer and a (*fastop) function pointer.

I considered that when introducing fastop_t.  I don't remember why I
didn't go that route.  It's entirely possible I completely forgot that
anonymous unions are allowed and thought it would mean changing a bunch
of use sites.