4.19-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ Upstream commit cf1b7201df59fb936f40f4a807433fe3f2ce310a ]
The log_martians variable is only used in an #ifdef, causing a 'make W=1' warning with gcc:
net/ipv4/route.c: In function 'ip_rt_send_redirect': net/ipv4/route.c:880:13: error: variable 'log_martians' set but not used [-Werror=unused-but-set-variable]
Change the #ifdef to an equivalent IS_ENABLED() to let the compiler see where the variable is used.
Fixes: 30038fc61adf ("net: ip_rt_send_redirect() optimization") Reviewed-by: David Ahern dsahern@kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de Reviewed-by: Eric Dumazet edumazet@google.com Link: https://lore.kernel.org/r/20240408074219.3030256-2-arnd@kernel.org Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/route.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index f4d41ceef9466..3014605105350 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -937,13 +937,11 @@ void ip_rt_send_redirect(struct sk_buff *skb) icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, gw); peer->rate_last = jiffies; ++peer->n_redirects; -#ifdef CONFIG_IP_ROUTE_VERBOSE - if (log_martians && + if (IS_ENABLED(CONFIG_IP_ROUTE_VERBOSE) && log_martians && peer->n_redirects == ip_rt_redirect_number) net_warn_ratelimited("host %pI4/if%d ignores redirects for %pI4 to %pI4\n", &ip_hdr(skb)->saddr, inet_iif(skb), &ip_hdr(skb)->daddr, &gw); -#endif } out_put_peer: inet_putpeer(peer);