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

[Ian Campbell <ian.campbell@citrix.com>]

On Fri, 2015-10-23 at 07:52 -0600, Jan Beulich wrote:
> > > > On 23.10.15 at 15:30, <ian.campbell@citrix.com> wrote:
> > On Fri, 2015-10-23 at 14:13 +0100, Julien Grall wrote:
> > > Hi,
> > > 
> > > On 04/10/15 20:24, Julien Grall wrote:
> > > > The keyword typeof is not portable:
> > > > 
> > > > /usr/src/freebsd/sys/xen/hypervisor.h:93:2: error: implicit
> > > > declaration
> > > > of function 'typeof' is invalid in C99
> > > > [-Werror,-Wimplicit-function-declaration]
> > > 
> > > Ping? Aside the fact that other bits of the header may not be iso
> > > compliant, I still think this patch is valid.
> > 
> > Yes, I agree.
> > Acked-by: Ian Campbell <ian.campbell@citrix.com>
> > 
> > Jan, after your earlier comments are you happy to go ahead with this
> > for
> > now and sort the other possible issues separately?
> 
> Well - it's an improvement, sure, so I'm not intending to block it
> going in if no better way can be determined in its place right away.
> What makes me hesitant is that I'm not sure there indeed will be a
> follow up to this any time soon.

Are you saying with "better way" that Julien's fix is incorrect and that
there is potentially a "proper" fix for this specific case? i.e. a followup
to fix the use of __typeof__ in set_xen_guest_handle_raw which this patch
introduces is expected?

I don't think you are, in which case are you suggesting that having fixed
this one issue that Julien should then be on the hook for fixing all
similar/related issues in these header?

I don't think it is right to mandate that Julien put this followup work
onto his TODO list as a condition of accepting this patch, if this is not a
case of Julien's change being incorrect and requiring a "proper" fix, but
that there are other similar things wrong elsewhere.

Of course if he or anyone else wants to do so voluntarily then that's
great.

Ian.