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Date:   Wed, 19 Feb 2020 19:12:50 +0100
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Jesper Dangaard Brouer <brouer@redhat.com>
Cc:     Andrii Nakryiko <andrii.nakryiko@gmail.com>,
        Andrii Nakryiko <andriin@fb.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        BPF-dev-list <bpf@vger.kernel.org>,
        Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Daniel Borkmann <borkmann@iogearbox.net>,
        David Miller <davem@davemloft.net>,
        LKML <linux-kernel@vger.kernel.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        Toke =?iso-8859-1?Q?H=F8iland-J=F8rgensen?= <toke@redhat.com>
Subject: Re: Kernel 5.5.4 build fail for BPF-selftests with latest LLVM
Message-ID: <20200219181250.GA2852230@kroah.com>
References: <20200219133012.7cb6ac9e@carbon>
 <20200219132856.GA2836367@kroah.com>
 <20200219144254.36c3921b@carbon>
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On Wed, Feb 19, 2020 at 02:42:54PM +0100, Jesper Dangaard Brouer wrote:
> On Wed, 19 Feb 2020 14:28:56 +0100
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> 
> > On Wed, Feb 19, 2020 at 01:30:12PM +0100, Jesper Dangaard Brouer wrote:
> > > Hi Andrii,
> > > 
> > > Downloaded tarball for kernel release 5.5.4, and I cannot compile
> > > tools/testing/selftests/bpf/ with latest LLVM release version 9.  
> > 
> > Is this something that recently broke?  If so, what commit caused it?
> 
> Digging through, it seems several commits.

'git bisect' is your friend here, can you please use it?

> > And has llvm 9 always worked here?
> 
> Yes, llvm-9 used to work for tools/testing/selftests/bpf/.

As of when?

thanks,

greg k-h