Re: more bpf samples build breakage...

From: Daniel Borkmann <daniel@iogearbox.net>
Date: Mon, 01 May 2017 22:38:58 +0200

BPF samples:

[root@apoc bpf]# make > /dev/null
In file included from
/root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:54:0:
/root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c: In
function ‘prog_load’:
/root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:119:5:
warning: overflow in implicit constant conversion [-Woverflow]
     -32 + offsetof(struct stats, uid)),
     ^
/root/cilium/net-next/samples/bpf/libbpf.h:135:12: note: in definition
of macro ‘BPF_STX_MEM’
   .off   = OFF,     \
            ^
/root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:121:5:
warning: overflow in implicit constant conversion [-Woverflow]
     -32 + offsetof(struct stats, packets), 1),
     ^
/root/cilium/net-next/samples/bpf/libbpf.h:155:12: note: in definition
of macro ‘BPF_ST_MEM’
   .off   = OFF,     \
            ^
/root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:129:5:
warning: overflow in implicit constant conversion [-Woverflow]
     -32 + offsetof(struct stats, bytes)),
     ^
/root/cilium/net-next/samples/bpf/libbpf.h:135:12: note: in definition
of macro ‘BPF_STX_MEM’
   .off   = OFF,     \
            ^
[root@apoc bpf]#

Above warning is from 51570a5ab2b7 ("A Sample of using socket
cookie and uid for traffic monitoring"). I can see to send a
fix for it.

Please do, thanks.