This patch dropped all the unnecessary '#if IS_ENABLED(CONFIG_MPTCP_IPV6)'
and '#endif'.

Signed-off-by: Geliang Tang <geliangtang(a)gmail.com>
---
 net/mptcp/options.c    | 6 ------
 net/mptcp/pm_netlink.c | 8 +-------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index e3fcd2b0ffd7..913cfc83bae4 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -221,22 +221,18 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 			if (opsize == TCPOLEN_MPTCP_ADD_ADDR ||
 			    opsize == TCPOLEN_MPTCP_ADD_ADDR_PORT)
 				mp_opt->addr.family = AF_INET;
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
 			else if (opsize == TCPOLEN_MPTCP_ADD_ADDR6 ||
 				 opsize == TCPOLEN_MPTCP_ADD_ADDR6_PORT)
 				mp_opt->addr.family = AF_INET6;
-#endif
 			else
 				break;
 		} else {
 			if (opsize == TCPOLEN_MPTCP_ADD_ADDR_BASE ||
 			    opsize == TCPOLEN_MPTCP_ADD_ADDR_BASE_PORT)
 				mp_opt->addr.family = AF_INET;
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
 			else if (opsize == TCPOLEN_MPTCP_ADD_ADDR6_BASE ||
 				 opsize == TCPOLEN_MPTCP_ADD_ADDR6_BASE_PORT)
 				mp_opt->addr.family = AF_INET6;
-#endif
 			else
 				break;
 		}
@@ -1155,10 +1151,8 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 		u8 len = TCPOLEN_MPTCP_ADD_ADDR_BASE;
 		u8 echo = MPTCP_ADDR_ECHO;
 
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
 		if (opts->addr.family == AF_INET6)
 			len = TCPOLEN_MPTCP_ADD_ADDR6_BASE;
-#endif
 
 		if (opts->addr.port)
 			len += TCPOLEN_MPTCP_PORT_LEN;
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 812e0874e276..a24f35dc0217 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -897,10 +897,8 @@ static const struct nla_policy mptcp_pm_policy[MPTCP_PM_ATTR_MAX + 1] = {
 
 static int mptcp_pm_family_to_addr(int family)
 {
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
 	if (family == AF_INET6)
 		return MPTCP_PM_ADDR_ATTR_ADDR6;
-#endif
 	return MPTCP_PM_ADDR_ATTR_ADDR4;
 }
 
@@ -933,11 +931,7 @@ static int mptcp_pm_parse_addr(struct nlattr *attr, struct genl_info *info,
 	}
 
 	entry->addr.family = nla_get_u16(tb[MPTCP_PM_ADDR_ATTR_FAMILY]);
-	if (entry->addr.family != AF_INET
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
-	    && entry->addr.family != AF_INET6
-#endif
-	    ) {
+	if (entry->addr.family != AF_INET && entry->addr.family != AF_INET6) {
 		NL_SET_ERR_MSG_ATTR(info->extack, attr,
 				    "unknown address family");
 		return -EINVAL;
-- 
2.30.2