Re: [PATCH v5] net: ip, diag -- Add diag interface for raw sockets

On Wed, 2016-09-28 at 05:57 -0700, Eric Dumazet wrote:

Note that some programs could fail to compile with the added union
anyway.

Some gcc versions are unable to compile a static init with an union

struct inet_diag_req_v2 foo = { .pad = 0, sdiag_family = AF_INET, };

When I cooked my recent fq commit I simply removed a pad and replaced
it :

git show fefa569a9d4bc4 -- include

This is a bit different of course, since struct tc_fq_qd_stats is only
one way : Kernel produces the content and gives it to user space.

User space should probably not need to initialize such a structure, but
who knows what a programmer can write ;)