Subject: Re: linux-next: build failure after merge of the block tree

From: Stephen Rothwell <[email-masked]>
Date: Tue, 2 May 2017 11:07:04 +1000

Hi all,

On Tue, 18 Apr 2017 13:02:29 +1000 Stephen Rothwell <[email-masked]> wrote:
>
> After merging the block tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> drivers/block/nbd.c: In function 'nbd_genl_connect':
> drivers/block/nbd.c:1662:10: error: too few arguments to function 'nla_parse_nested'
>     ret = nla_parse_nested(socks, NBD_SOCK_MAX, attr,
>           ^
> In file included from include/net/rtnetlink.h:5:0,
>                  from include/net/sch_generic.h:12,
>                  from include/linux/filter.h:20,
>                  from include/net/sock.h:64,
>                  from drivers/block/nbd.c:32:
> include/net/netlink.h:754:19: note: declared here
>  static inline int nla_parse_nested(struct nlattr *tb[], int maxtype,
>                    ^
> drivers/block/nbd.c: In function 'nbd_genl_reconfigure':
> drivers/block/nbd.c:1818:10: error: too few arguments to function 'nla_parse_nested'
>     ret = nla_parse_nested(socks, NBD_SOCK_MAX, attr,
>           ^
> In file included from include/net/rtnetlink.h:5:0,
>                  from include/net/sch_generic.h:12,
>                  from include/linux/filter.h:20,
>                  from include/net/sock.h:64,
>                  from drivers/block/nbd.c:32:
> include/net/netlink.h:754:19: note: declared here
>  static inline int nla_parse_nested(struct nlattr *tb[], int maxtype,
>                    ^
> 
> Caused by commits
> 
>   e46c7287b1c2 ("nbd: add a basic netlink interface")
>   b7aa3d39385d ("nbd: add a reconfigure netlink command")
> 
> interacting with commit
> 
>   fceb6435e852 ("netlink: pass extended ACK struct to parsing functions")
> 
> from the net-next tree.
> 
> I have applied the following merge fix patch:
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Tue, 18 Apr 2017 12:59:05 +1000
> Subject: [PATCH] nbd: fix up for nla_parse_nested() API change
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>
> ---
>  drivers/block/nbd.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
> index b78f23ce2395..5049d19f3940 100644
> --- a/drivers/block/nbd.c
> +++ b/drivers/block/nbd.c
> @@ -1660,7 +1660,7 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
>  				goto out;
>  			}
>  			ret = nla_parse_nested(socks, NBD_SOCK_MAX, attr,
> -					       nbd_sock_policy);
> +					       nbd_sock_policy, NULL);
>  			if (ret != 0) {
>  				printk(KERN_ERR "nbd: error processing sock list\n");
>  				ret = -EINVAL;
> @@ -1816,7 +1816,7 @@ static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
>  				goto out;
>  			}
>  			ret = nla_parse_nested(socks, NBD_SOCK_MAX, attr,
> -					       nbd_sock_policy);
> +					       nbd_sock_policy, NULL);
>  			if (ret != 0) {
>  				printk(KERN_ERR "nbd: error processing sock list\n");
>  				ret = -EINVAL;
> -- 
> 2.11.0

So, this merge fix is now needed when the net-next tree is merged (as
Linus has merged the block tree).

-- 
Cheers,
Stephen Rothwell