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Date:   Wed, 09 Dec 2020 19:42:32 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     kuba@...nel.org
Cc:     simon.horman@...ronome.com, netdev@...r.kernel.org,
        oss-drivers@...ronome.com, lkp@...el.com
Subject: Re: [PATCH net-next] nfp: silence set but not used warning with
 IPV6=n

From: Jakub Kicinski <kuba@...nel.org>
Date: Wed,  9 Dec 2020 08:18:21 -0800

> Test robot reports:
> 
> drivers/net/ethernet/netronome/nfp/crypto/tls.c: In function 'nfp_net_tls_rx_resync_req':
> drivers/net/ethernet/netronome/nfp/crypto/tls.c:477:18: warning: variable 'ipv6h' set but not used [-Wunused-but-set-variable]
>   477 |  struct ipv6hdr *ipv6h;
>       |                  ^~~~~
> In file included from include/linux/compiler_types.h:65,
>                     from <command-line>:
> drivers/net/ethernet/netronome/nfp/crypto/tls.c: In function 'nfp_net_tls_add':
> include/linux/compiler_attributes.h:208:41: warning: statement will never be executed [-Wswitch-unreachable]
>   208 | # define fallthrough                    __attribute__((__fallthrough__))
>       |                                         ^~~~~~~~~~~~~
> drivers/net/ethernet/netronome/nfp/crypto/tls.c:299:3: note: in expansion of macro 'fallthrough'
>   299 |   fallthrough;
>       |   ^~~~~~~~~~~
> 
> Use the IPv6 header in the switch, it doesn't matter which header
> we use to read the version field.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Applied, thanks.

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