On Tue, Mar 01, 2016 at 06:52:14PM +0200, Eli Cohen wrote: > +struct ifla_vf_guid { > + __u32 vf; > + __u64 guid; > +}; This type definition differs in size on 64-bit and (most of) 32-bit architectures, and it breaks 32-on-64-bit compat applications, as a result.