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Date:   Tue, 19 Apr 2022 11:56:20 +1000
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Daniel Borkmann <daniel@iogearbox.net>,
        Alexei Starovoitov <ast@kernel.org>,
        Andrii Nakryiko <andrii@kernel.org>
Cc:     bpf <bpf@vger.kernel.org>, Networking <netdev@vger.kernel.org>,
        Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: linux-next: build failure after merge of the bpf-next tree
Message-ID: <20220419115620.65580586@canb.auug.org.au>
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Hi all,

After merging the bpf-next tree, today's linux-next build
(x86_64 allmodconfig) failed like this:

In file included from include/linux/compiler_types.h:73,
                 from <command-line>:
drivers/net/ethernet/intel/i40e/i40e_xsk.c: In function 'i40e_run_xdp_zc':
include/linux/compiler_attributes.h:222:41: error: attribute 'fallthrough' =
not preceding a case label or default label [-Werror]
  222 | # define fallthrough                    __attribute__((__fallthroug=
h__))
      |                                         ^~~~~~~~~~~~~
drivers/net/ethernet/intel/i40e/i40e_xsk.c:192:17: note: in expansion of ma=
cro 'fallthrough'
  192 |                 fallthrough; /* handle aborts by dropping packet */
      |                 ^~~~~~~~~~~
cc1: all warnings being treated as errors
In file included from include/linux/compiler_types.h:73,
                 from <command-line>:
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c: In function 'ixgbe_run_xdp_zc=
':
include/linux/compiler_attributes.h:222:41: error: attribute 'fallthrough' =
not preceding a case label or default label [-Werror]
  222 | # define fallthrough                    __attribute__((__fallthroug=
h__))
      |                                         ^~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c:147:17: note: in expansion of =
macro 'fallthrough'
  147 |                 fallthrough; /* handle aborts by dropping packet */
      |                 ^~~~~~~~~~~
cc1: all warnings being treated as errors

Caused by commits

  b8aef650e549 ("i40e, xsk: Terminate Rx side of NAPI when XSK Rx queue get=
s full")
  c7dd09fd4628 ("ixgbe, xsk: Terminate Rx side of NAPI when XSK Rx queue ge=
ts full")

I have used the bpf-next tree from next-20220414 for today.

--=20
Cheers,
Stephen Rothwell

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