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Subject: Re: [PATCH v5] net: ip, diag -- Add diag interface for raw sockets
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>,
        David Ahern <dsa@cumulusnetworks.com>, netdev@vger.kernel.org,
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Date: Wed, 28 Sep 2016 06:49:51 -0700
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On Wed, 2016-09-28 at 16:43 +0300, Cyrill Gorcunov wrote:
> On Wed, Sep 28, 2016 at 06:29:08AM -0700, Eric Dumazet wrote:
> > > 
> > > Oh, crap :( I've been looking into uapi headers, found that we
> > > use anonymous unions (for example include/uapi/linux/bcache.h)
> > > and thought it will be safe (and my test builds didn't fail).
> > > Are you happen to know which gcc versions cant do that?
> > 
> > The most recent example I have in mind is a kbuild bot report on the
> > recent TCP BBR patches. We had to rework the patch to avoid the problem.
> > 
> > If I remember well, this was a gcc-4.7, but not on x86.
> 
> 4.7 is pretty widespread, so I've to think...

Sorry, 4.4.7 it was

https://www.mail-archive.com/netdev@vger.kernel.org/msg128714.html