Re: [dpdk-dev] [PATCH 3/3] ethdev: fix build warning on 64-bit value

[David Marchand <david.marchand@redhat.com>]

On Mon, Apr 27, 2020 at 3:34 PM Bruce Richardson
<bruce.richardson@intel.com> wrote:
>
> On Mon, Apr 27, 2020 at 03:23:41PM +0200, David Marchand wrote:
> > Building OVS with dpdk, sparse complains about 64-bit constant being
> > passed as a normal integer that can't fit it:
> > error: constant 0xffffffffffffffff is so big it is unsigned long
> >
> > Fixes: ecbc8570131d ("ethdev: add PFCP header to flow API")
> >
> > Signed-off-by: David Marchand <david.marchand@redhat.com>
> > ---
> >  lib/librte_ethdev/rte_flow.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
> > index 132b44edc6..1fb94f35e8 100644
> > --- a/lib/librte_ethdev/rte_flow.h
> > +++ b/lib/librte_ethdev/rte_flow.h
> > @@ -1534,7 +1534,7 @@ struct rte_flow_item_pfcp {
> >  #ifndef __cplusplus
> >  static const struct rte_flow_item_pfcp rte_flow_item_pfcp_mask = {
> >       .s_field = 0x01,
> > -     .seid = RTE_BE64(0xffffffffffffffff),
> > +     .seid = RTE_BE64(UINT64_C(0xffffffffffffffff)),
>
> Rather than cast, why not put "ULL" at the end. If we are going to cast,
> why not just put "-1" in to save some digits.

I preferred this form in the hope future developers who want
0x0fffffffffffffff will copy/paste this.

-- 
David Marchand