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SubjectRe: -git tree build failure in drivers/net/cnic.c: undefined reference to `ip6_route_output'
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From: Randy Dunlap <randy.dunlap@oracle.com>
Date: Fri, 12 Jun 2009 11:43:48 -0700

> Ingo Molnar wrote:
>> today's -git fails to build with ipv6 disabled (x86):
>>
>> drivers/built-in.o: In function `cnic_get_v6_route':
>> cnic.c:(.text+0x104c42): undefined reference to `ip6_route_output'
>>
>> introduced by this new driver:
>>
>> a463696: [SCSI] cnic: Add new Broadcom CNIC driver.
>
> I just posted a patch for this to netdev and it was acked by its maintainer.
> Patch is below.

I was hoping the scsi folks, or Linus directly, would pick this up.

But I can take it in too if it slips through the cracks.

> From: Randy Dunlap <randy.dunlap@oracle.com>
>
> Fix cnic build for case of CONFIG_INET=n.
> Fix cnic build for case of CONFIG_IPV6=m and CONFIG_CNIC=y.
>
> Fixes these build errors:
>
> cnic.c:(.text+0x236a1d): undefined reference to `ip_route_output_key'
> cnic.c:(.text+0x15a8e8): undefined reference to `ip6_route_output'
>
> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
> ---
> drivers/net/cnic.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> --- linux-next-20090612.orig/drivers/net/cnic.c
> +++ linux-next-20090612/drivers/net/cnic.c
> @@ -1454,6 +1454,7 @@ static inline u16 cnic_get_vlan(struct n
> static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
> struct dst_entry **dst)
> {
> +#if defined(CONFIG_INET)
> struct flowi fl;
> int err;
> struct rtable *rt;
> @@ -1465,12 +1466,15 @@ static int cnic_get_v4_route(struct sock
> if (!err)
> *dst = &rt->u.dst;
> return err;
> +#else
> + return -ENETUNREACH;
> +#endif
> }
>
> static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
> struct dst_entry **dst)
> {
> -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
> +#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
> struct flowi fl;
>
> memset(&fl, 0, sizeof(fl));
> @@ -1550,7 +1554,7 @@ static int cnic_get_route(struct cnic_so
> clear_bit(SK_F_IPV6, &csk->flags);
>
> if (is_v6) {
> -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
> +#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
> set_bit(SK_F_IPV6, &csk->flags);
> err = cnic_get_v6_route(&saddr->remote.v6, &dst);
> if (err)


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