On Fri, May 14, 2021 at 03:53:48AM +0200, Matteo Croce wrote:
> From: Matteo Croce <mcroce@xxxxxxxxxxxxx>
>
> The br_ip6_multicast_add_router() prototype is defined only when
> CONFIG_IPV6 is enabled, but the function is always referenced, so there
> is this build error with CONFIG_IPV6 not defined:
>
> net/bridge/br_multicast.c: In function ‘__br_multicast_enable_port’:
> net/bridge/br_multicast.c:1743:3: error: implicit declaration of function ‘br_ip6_multicast_add_router’; did you mean ‘br_ip4_multicast_add_router’? [-Werror=implicit-function-declaration]
> 1743 | br_ip6_multicast_add_router(br, port);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
> | br_ip4_multicast_add_router
> net/bridge/br_multicast.c: At top level:
> net/bridge/br_multicast.c:2804:13: warning: conflicting types for ‘br_ip6_multicast_add_router’
> 2804 | static void br_ip6_multicast_add_router(struct net_bridge *br,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
> net/bridge/br_multicast.c:2804:13: error: static declaration of ‘br_ip6_multicast_add_router’ follows non-static declaration
> net/bridge/br_multicast.c:1743:3: note: previous implicit declaration of ‘br_ip6_multicast_add_router’ was here
> 1743 | br_ip6_multicast_add_router(br, port);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Fix this build error by moving the definition out of the #ifdef.
>
> Fixes: a3c02e769efe ("net: bridge: mcast: split multicast router state for IPv4 and IPv6")
> Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxxxxx>
> ---
> net/bridge/br_multicast.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
> index 0703725527b3..53c3a9d80d9c 100644
> --- a/net/bridge/br_multicast.c
> +++ b/net/bridge/br_multicast.c
> @@ -62,9 +62,9 @@ static void br_multicast_port_group_rexmit(struct timer_list *t);
>
> static void
> br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted);
> -#if IS_ENABLED(CONFIG_IPV6)
> static void br_ip6_multicast_add_router(struct net_bridge *br,
> struct net_bridge_port *port);
> +#if IS_ENABLED(CONFIG_IPV6)
> static void br_ip6_multicast_leave_group(struct net_bridge *br,
> struct net_bridge_port *port,
> const struct in6_addr *group,
> --
> 2.31.1
>
Acked-by: Linus Lüssing <linus.luessing@xxxxxxxxx>
