Hi Arnd,
On 02/20/2018 10:16 PM, Arnd Bergmann wrote:
> The only user of this variable is inside of an #ifdef, causing
> a warning without CONFIG_INET:
>
> net/core/filter.c: In function '____bpf_sock_ops_cb_flags_set':
> net/core/filter.c:3382:6: error: unused variable 'val'
> [-Werror=unused-variable]
> int val = argval & BPF_SOCK_OPS_ALL_CB_FLAGS;
>
> This adds the same #ifdef around the declaration.
>
> Fixes: b13d88072172 ("bpf: Adds field bpf_sock_ops_cb_flags to tcp_sock")
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> ---
> net/core/filter.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 08ab4c65a998..c3dc6d60b4bb 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -3379,7 +3379,9 @@ BPF_CALL_2(bpf_sock_ops_cb_flags_set, struct
> bpf_sock_ops_kern *, bpf_sock,
> int, argval)
> {
> struct sock *sk = bpf_sock->sk;
> +#ifdef CONFIG_INET
> int val = argval & BPF_SOCK_OPS_ALL_CB_FLAGS;
> +#endif
Looks good, thanks for the fix!
Could you move the existing '#ifdef CONFIG_INET' to the beginning of
the function given the only error in case of !CONFIG_INET is -EINVAL
anyway? That would at least not increase the ifdef ugliness further.
Thanks a lot,
Daniel
> if (!sk_fullsock(sk))
> return -EINVAL;
>
