Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Fri, 9 Oct 2020 15:28:46 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     Josh Poimboeuf <jpoimboe@redhat.com>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: linux-next: build failure after merge of the tip tree
Message-ID: <20201009152846.072e6bbf@canb.auug.org.au>
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="Sig_/D8pWvJ1NJO5SiQ1GCGu+IE4";
 protocol="application/pgp-signature"; micalg=pgp-sha256
Precedence: bulk

--Sig_/D8pWvJ1NJO5SiQ1GCGu+IE4
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable

Hi all,

After merging the tip tree, today's linux-next build (perf) failed
like this:

In file included from tools/include/linux/build_bug.h:5,
                 from tools/include/linux/kernel.h:8,
                 from util/intel-pt-decoder/intel-pt-insn-decoder.c:7:
util/intel-pt-decoder/../../../arch/x86/lib/insn.c: In function '__insn_get=
_emulate_prefix':
tools/include/linux/compiler.h:37:38: error: nested extern declaration of '=
__compiletime_assert_0' [-Werror=3Dnested-externs]
   37 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNT=
ER__)
      |                                      ^~~~~~~~~~~~~~~~~~~~~
tools/include/linux/compiler.h:16:15: note: in definition of macro '__compi=
letime_assert'
   16 |   extern void prefix ## suffix(void) __compiletime_error(msg); \
      |               ^~~~~~
tools/include/linux/compiler.h:37:2: note: in expansion of macro '_compilet=
ime_assert'
   37 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNT=
ER__)
      |  ^~~~~~~~~~~~~~~~~~~
tools/include/linux/build_bug.h:39:37: note: in expansion of macro 'compile=
time_assert'
   39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
      |                                     ^~~~~~~~~~~~~~~~~~
tools/include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_B=
UG_ON_MSG'
   59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
      |                     ^~~~~~~~~~~~~~~~
util/intel-pt-decoder/../../../arch/x86/lib/insn.c:27:3: note: in expansion=
 of macro 'BUILD_BUG'
   27 |   BUILD_BUG(); break;     \
      |   ^~~~~~~~~
util/intel-pt-decoder/../../../arch/x86/lib/insn.c:40:41: note: in expansio=
n of macro 'leXX_to_cpu'
   40 |  ({ t r =3D *(t*)((insn)->next_byte + n); leXX_to_cpu(t, r); })
      |                                         ^~~~~~~~~~~
util/intel-pt-decoder/../../../arch/x86/lib/insn.c:46:61: note: in expansio=
n of macro '__peek_nbyte_next'
   46 |  ({ if (unlikely(!validate_next(t, insn, n))) goto err_out; __peek_=
nbyte_next(t, insn, n); })
      |                                                             ^~~~~~~=
~~~~~~~~~~
util/intel-pt-decoder/../../../arch/x86/lib/insn.c:86:7: note: in expansion=
 of macro 'peek_nbyte_next'
   86 |   if (peek_nbyte_next(insn_byte_t, insn, i) !=3D prefix[i])
      |       ^~~~~~~~~~~~~~~

Caused by commit

  2a522b53c470 ("x86/insn: Support big endian cross-compiles")

I have reverted commits

a23b701ae9b3 objtool: Rework header include paths
1b4998c364bc objtool: Fix x86 orc generation on big endian cross compiles
317664a7fcc9 objtool: Fix reloc generation on big endian cross compiles
2a522b53c470 x86/insn: Support big endian cross-compiles
2486baae2cf6 objtool: Allow nested externs to enable BUILD_BUG()

for today.

This is a PowerPC LE native build of tools/perf.

--=20
Cheers,
Stephen Rothwell

--Sig_/D8pWvJ1NJO5SiQ1GCGu+IE4
Content-Type: application/pgp-signature
Content-Description: OpenPGP digital signature

-----BEGIN PGP SIGNATURE-----

iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl9/5v4ACgkQAVBC80lX
0GwuHgf/bNF770bTmccxD7Bb7XHLgwE9t50XM5TA1Rh3qyoosyt4D2I1EfyJQhuJ
Nq3uOMRMQyqWyYu53sbHZhyb4rMFdcZzrG0iewDFHLKw7pZ/BCxzsO1GGaJC4h6v
QKOF5IQJOX+Lj3Iu55+rSXycSmfJpur5ECa6BaNfWGZVfrXf8Zba14eloWScmNvb
UknSJtNK4ftW6tEpy/EeKUPvCIMlMO9yJ9ho6kwNTT4znRTBs7ltdu4KbMUSHZB6
+VJwRPQ+0ParZW0QGwjjHkdBgO/sSBCx9Mj1P9pw9lCj2cVtepIyaggYevkJnMhG
fe8i5FbZbYA/4r2T3kTc07S2WqLHCA==
=QJTb
-----END PGP SIGNATURE-----

--Sig_/D8pWvJ1NJO5SiQ1GCGu+IE4--