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

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of David Marchand
> Sent: Monday, April 27, 2020 2:37 PM
> To: Richardson, Bruce <bruce.richardson@intel.com>
> Cc: dev <dev@dpdk.org>; Ori Kam <orika@mellanox.com>; Thomas Monjalon <thomas@monjalon.net>; Yigit, Ferruh
> <ferruh.yigit@intel.com>; Andrew Rybchenko <arybchenko@solarflare.com>; Zhang, Xiao <xiao.zhang@intel.com>
> Subject: Re: [dpdk-dev] [PATCH 3/3] ethdev: fix build warning on 64-bit value
> 
> 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.
> 

As I remember there should be UINT64_MAX in stdint.h.