From d92cfdbbeaefb467de4fac98679fa6c33461d250 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 13 Jan 2015 15:10:27 +0100 Subject: [PATCH] bridge: only provide proxy ARP when CONFIG_INET is enabled When IPV4 support is disabled, we cannot call arp_send from the bridge code, which would result in a kernel link error: net/built-in.o: In function `br_handle_frame_finish': :(.text+0x59914): undefined reference to `arp_send' :(.text+0x59a50): undefined reference to `arp_tbl' This makes the newly added proxy ARP support in the bridge code depend on the CONFIG_INET symbol and lets the compiler optimize the code out to avoid the link error. Signed-off-by: Arnd Bergmann Fixes: 958501163ddd ("bridge: Add support for IEEE 802.11 Proxy ARP") Cc: Kyeyoon Park Signed-off-by: David S. Miller --- net/bridge/br_input.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 1f1de715197c..e2aa7be3a847 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -154,7 +154,8 @@ int br_handle_frame_finish(struct sk_buff *skb) dst = NULL; if (is_broadcast_ether_addr(dest)) { - if (p->flags & BR_PROXYARP && + if (IS_ENABLED(CONFIG_INET) && + p->flags & BR_PROXYARP && skb->protocol == htons(ETH_P_ARP)) br_do_proxy_arp(skb, br, vid);