From aa2bc739ef4a181a7589eb009be96a870cc1788f Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Mon, 30 Oct 2017 13:46:47 -0700
Subject: [PATCH] net: filter: remove unused variable and fix warning

bpf_getsockopt bpf call sets the ret variable to zero and
never changes it.  What's worse in case CONFIG_INET is
not selected the variable is completely unused generating
a warning.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Lawrence Brakmo <brakmo@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/filter.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index 721c30889033..a0112168d6f9 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3288,7 +3288,6 @@ BPF_CALL_5(bpf_getsockopt, struct bpf_sock_ops_kern *, bpf_sock,
 	   int, level, int, optname, char *, optval, int, optlen)
 {
 	struct sock *sk = bpf_sock->sk;
-	int ret = 0;
 
 	if (!sk_fullsock(sk))
 		goto err_clear;
@@ -3308,7 +3307,7 @@ BPF_CALL_5(bpf_getsockopt, struct bpf_sock_ops_kern *, bpf_sock,
 	} else {
 		goto err_clear;
 	}
-	return ret;
+	return 0;
 #endif
 err_clear:
 	memset(optval, 0, optlen);
-- 
2.30.2