Re: [PATCH v1 net-next] selftests: net: af_unix: Fix a build error of unix_connect.c.

[Kuniyuki Iwashima <kuniyu@amazon.com>]

From:   Jakub Kicinski <kuba@kernel.org>
Date:   Tue, 19 Jul 2022 17:32:01 -0700
> On Mon, 18 Jul 2022 09:23:50 -0700 Kuniyuki Iwashima wrote:
> > This patch fixes a build error reported in the link. [0]
> > 
> >   unix_connect.c: In function ‘unix_connect_test’:
> >   unix_connect.c:115:55: error: expected identifier before ‘(’ token
> >    #define offsetof(type, member) ((size_t)&((type *)0)->(member))
> >                                                        ^
> >   unix_connect.c:128:12: note: in expansion of macro ‘offsetof’
> >     addrlen = offsetof(struct sockaddr_un, sun_path) + variant->len;
> >               ^~~~~~~~
> 
> Can we delete this define and use stddef.h instead?  man offsetof
> This is not kernel code the C standard lib is at our disposal.

Ah, it works.
I'll respin v2.

Thank you!