A fix to ipv6 structure definitions removed the now superfluous
definition of in6_pktinfo in this file.
But, use of the glibc definition requires defining _GNU_SOURCE
(see also https://sourceware.org/bugzilla/show_bug.cgi?id=6775).
Before this change, the following would fail for me:
make
make headers_install
make M=Documentation/networking/timestamping
with
Documentation/networking/timestamping/txtimestamp.c: In function '__recv_errmsg_cmsg':
Documentation/networking/timestamping/txtimestamp.c:205:33: error: dereferencing pointer to incomplete type
Documentation/networking/timestamping/txtimestamp.c:206:23: error: dereferencing pointer to incomplete type
After this patch compilation succeeded.
Fixes: cd91cc5bdd ("doc: fix the compile error of txtimestamp.c")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
