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Subject: Re: linux-next: build failure after merge of the bpf-next tree
To:     Stephen Rothwell <sfr@canb.auug.org.au>,
        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>
References: <20220419115620.65580586@canb.auug.org.au>
 <20220421103200.2b4e8424@canb.auug.org.au>
From:   Daniel Borkmann <daniel@iogearbox.net>
Message-ID: <ac093b0a-dba7-b8b8-8a70-fccbed8fee76@iogearbox.net>
Date:   Thu, 21 Apr 2022 11:45:46 +0200
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On 4/21/22 2:32 AM, Stephen Rothwell wrote:
> Hi all,

Maciej, I presume you are already working on a follow-up for the below?

> On Tue, 19 Apr 2022 11:56:20 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>>
>> 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__((__fallthrough__))
>>        |                                         ^~~~~~~~~~~~~
>> drivers/net/ethernet/intel/i40e/i40e_xsk.c:192:17: note: in expansion of macro '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__((__fallthrough__))
>>        |                                         ^~~~~~~~~~~~~
>> 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 gets full")
>>    c7dd09fd4628 ("ixgbe, xsk: Terminate Rx side of NAPI when XSK Rx queue gets full")
>>
>> I have used the bpf-next tree from next-20220414 for today.
> 
> I am still getting these failures ...
>