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Date:   Wed, 19 Aug 2020 08:48:56 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenz Bauer <lmb@...udflare.com>
Cc:     jakub@...udflare.com, john.fastabend@...il.com,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        kernel-team@...udflare.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next 2/6] bpf: sockmap: merge sockmap and sockhash
 update functions

On Wed, 19 Aug 2020 10:24:32 +0100 Lorenz Bauer wrote:
> --- a/net/core/sock_map.c
> +++ b/net/core/sock_map.c
> @@ -559,10 +559,12 @@ static bool sock_map_sk_state_allowed(const struct sock *sk)
>  	return false;
>  }
>  
> -static int sock_map_update_elem(struct bpf_map *map, void *key,
> -				void *value, u64 flags)
> +static int sock_hash_update_common(struct bpf_map *map, void *key,
> +				   struct sock *sk, u64 flags);
> +
> +int sock_map_update_elem(struct bpf_map *map, void *key,
> +			 void *value, u64 flags)
>  {
> -	u32 idx = *(u32 *)key;
>  	struct socket *sock;
>  	struct sock *sk;
>  	int ret;

net/core/sock_map.c:565:5: warning: no previous prototype for ‘sock_map_update_elem’ [-Wmissing-prototypes]
  565 | int sock_map_update_elem(struct bpf_map *map, void *key,
      |     ^~~~~~~~~~~~~~~~~~~~

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