netdev - Re: [patch 1/1] kernel/trace/bpf_trace.c: work around gcc-4.4.4 anon union initialization bug

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Message-ID: <20160719003802.GA20768@wfg-t540p.sh.intel.com>
Date:	Tue, 19 Jul 2016 08:38:02 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:	akpm@...ux-foundation.org, davem@...emloft.net,
	netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net
Subject: Re: [patch 1/1] kernel/trace/bpf_trace.c: work around gcc-4.4.4 anon
 union initialization bug

Hi Alexei,

On Mon, Jul 18, 2016 at 05:33:07PM -0700, Alexei Starovoitov wrote:
>On Mon, Jul 18, 2016 at 03:50:58PM -0700, akpm@...ux-foundation.org wrote:
>> From: Andrew Morton <akpm@...ux-foundation.org>
>> Subject: kernel/trace/bpf_trace.c: work around gcc-4.4.4 anon union initialization bug
>>
>> kernel/trace/bpf_trace.c: In function 'bpf_event_output':
>> kernel/trace/bpf_trace.c:312: error: unknown field 'next' specified in initializer
>> kernel/trace/bpf_trace.c:312: warning: missing braces around initializer
>> kernel/trace/bpf_trace.c:312: warning: (near initialization for 'raw.frag.<anonymous>')
>>
>> Fixes: 555c8a8623a3a87 ("bpf: avoid stack copy and use skb ctx for event output")
>> Acked-by: Daniel Borkmann <daniel@...earbox.net>
>> Cc: Alexei Starovoitov <ast@...nel.org>
>> Cc: David S. Miller <davem@...emloft.net>
>> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
>
>Acked-by: Alexei Starovoitov <ast@...nel.org>
>
>Fengguang can you add gcc-4.4 to buildbot. Thanks!

Sure. Currently we only test gcc-6. It'd be easy to test more versions
concurrently, like

gcc-4.4
gcc-4.6
gcc-4.8
gcc-4.9
gcc-5
gcc-6

Thanks,
Fengguang