linux-kernel - linux-next: build warning after merge of the net-next tree

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Message-ID: <20190416112039.25136d0b@canb.auug.org.au>
Date:   Tue, 16 Apr 2019 11:20:39 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Hurley <john.hurley@...ronome.com>,
        Simon Horman <simon.horman@...ronome.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Kees Cook <keescook@...omium.org>
Subject: linux-next: build warning after merge of the net-next tree

Hi all,

After merging the net-next tree, today's linux-next build (x86_64
allmodconfig) produced this warning:

drivers/net/ethernet/netronome/nfp/flower/offload.c: In function 'nfp_flower_copy_pre_actions':
drivers/net/ethernet/netronome/nfp/flower/offload.c:630:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if (tunnel_act)
       ^
drivers/net/ethernet/netronome/nfp/flower/offload.c:632:3: note: here
   case NFP_FL_ACTION_OPCODE_PRE_LAG:
   ^~~~

Introduced by commit

  1c6952ca587d ("nfp: flower: generate merge flow rule")

I get this warning because I am building with -Wimplicit-fallthrough
in attempt to catch new additions early.  The gcc warning can be turned
off by adding a /* fall through */ comment at the point the fall through
happens (assuming that the fall through is intentional).

-- 
Cheers,
Stephen Rothwell

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