From: Arnd Bergmann Date: Mon, 8 Jul 2019 12:57:21 +0000 (+0200) Subject: bpf: avoid unused variable warning in tcp_bpf_rtt() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=bef8e2639242e7f7214f1ab3b37ace1415a4f750;p=openwrt%2Fstaging%2Fblogic.git bpf: avoid unused variable warning in tcp_bpf_rtt() When CONFIG_BPF is disabled, we get a warning for an unused variable: In file included from drivers/target/target_core_device.c:26: include/net/tcp.h:2226:19: error: unused variable 'tp' [-Werror,-Wunused-variable] struct tcp_sock *tp = tcp_sk(sk); The variable is only used in one place, so it can be replaced with its value there to avoid the warning. Fixes: 23729ff23186 ("bpf: add BPF_CGROUP_SOCK_OPS callback that is executed on every RTT") Signed-off-by: Arnd Bergmann Acked-by: Soheil Hassas Yeganeh Signed-off-by: Daniel Borkmann --- diff --git a/include/net/tcp.h b/include/net/tcp.h index e16d8a3fd3b4..cca3c59b98bf 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2223,9 +2223,7 @@ static inline bool tcp_bpf_ca_needs_ecn(struct sock *sk) static inline void tcp_bpf_rtt(struct sock *sk) { - struct tcp_sock *tp = tcp_sk(sk); - - if (BPF_SOCK_OPS_TEST_FLAG(tp, BPF_SOCK_OPS_RTT_CB_FLAG)) + if (BPF_SOCK_OPS_TEST_FLAG(tcp_sk(sk), BPF_SOCK_OPS_RTT_CB_FLAG)) tcp_call_bpf(sk, BPF_SOCK_OPS_RTT_CB, 0, NULL); }