netdev - Re: linux-next: build failure after merge of the bpf-next tree

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Message-ID: <20210326121808.2da7ac74@canb.auug.org.au>
Date:   Fri, 26 Mar 2021 12:18:08 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Björn Töpel <bjorn.topel@...el.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Networking <netdev@...r.kernel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Björn Töpel <bjorn@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: linux-next: build failure after merge of the bpf-next tree

Hi all,

On Fri, 12 Mar 2021 12:00:14 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> [Cc'ing a few (maybe) interested parties]
> 
> On Thu, 11 Mar 2021 07:47:03 +0100 Björn Töpel <bjorn.topel@...el.com> wrote:
> >
> > On 2021-03-11 01:47, Stephen Rothwell wrote:  
> > > 
> > > After merging the bpf-next tree, today's linux-next build (perf) failed
> > > like this:
> > > 
> > > make[3]: *** No rule to make target 'libbpf_util.h', needed by '/home/sfr/next/perf/staticobjs/xsk.o'.  Stop.  
> > 
> > It's an incremental build issue, as pointed out here [1], that is
> > resolved by cleaning the build.  
> 
> Does this mean there is a deficiency in the dependencies in our build system?
> 
> > [1] https://lore.kernel.org/bpf/CAEf4BzYPDF87At4=_gsndxof84OiqyJxgAHL7_jvpuntovUQ8w@mail.gmail.com/
> >   
> > > Caused by commit
> > > 
> > >    7e8bbe24cb8b ("libbpf: xsk: Move barriers from libbpf_util.h to xsk.h")
> > > 
> > > I have used the bpf tree from next-20210310 for today.  
> 
> I have set my system to remove the object directory before building
> after merging the bpf-next tree for now.

I now get this build failure after I merge the net-next tree :-(

-- 
Cheers,
Stephen Rothwell

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