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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Wed, 2 Sep 2020 10:47:51 +0530
Message-ID: <CA+G9fYtoxNSRKncYBnc=LgYVJTW51rQGAgnLaWwhYZT==VeqAA@mail.gmail.com>
Subject: Re: [PATCH 5.4 000/214] 5.4.62-rc1 review
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        open list <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Shuah Khan <shuah@kernel.org>, patches@kernelci.org,
        Ben Hutchings <ben.hutchings@codethink.co.uk>,
        lkft-triage@lists.linaro.org,
        linux- stable <stable@vger.kernel.org>
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On Wed, 2 Sep 2020 at 00:39, Guenter Roeck <linux@roeck-us.net> wrote:
>
> On 9/1/20 8:08 AM, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 5.4.62 release.
> > There are 214 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Thu, 03 Sep 2020 15:09:01 +0000.
> > Anything received after that time might be too late.
> >
>
> Building x86_64:tools/perf ... failed
> --------------
> Error log:
> Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs fr=
om latest version at 'include/uapi/linux/kvm.h'
> Warning: Kernel ABI header at 'tools/include/uapi/linux/sched.h' differs =
from latest version at 'include/uapi/linux/sched.h'
> Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' =
differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
> Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/unistd.h' =
differs from latest version at 'arch/x86/include/uapi/asm/unistd.h'
> Makefile.config:846: No libcap found, disables capability support, please=
 install libcap-devel/libcap-dev
> Makefile.config:958: No openjdk development package found, please install=
 JDK package, e.g. openjdk-8-jdk, java-1.8.0-openjdk-devel
>   PERF_VERSION =3D 5.4.61.gf5583dd12e6f
> In file included from btf_dump.c:16:0:
> btf_dump.c: In function =E2=80=98btf_align_of=E2=80=99:
> tools/include/linux/kernel.h:53:17: error: comparison of distinct pointer=
 types lacks a cast [-Werror]
>   (void) (&_min1 =3D=3D &_min2);  \
>                  ^
> btf_dump.c:770:10: note: in expansion of macro =E2=80=98min=E2=80=99
>    return min(sizeof(void *), t->size);
>           ^~~
> cc1: all warnings being treated as errors
> make[7]: *** [/tmp/buildbot-builddir/tools/perf/staticobjs/btf_dump.o] Er=
ror 1

This perf build break noticed and reported on mailing list [1]

>
> Bisect log below. Reverting the following two patches fixes the problem.
>
> 497ef945f327 libbpf: Fix build on ppc64le architecture
> 401834f55ce7 libbpf: Handle GCC built-in types for Arm NEON
>
> Guenter
>
> ---
> $ git bisect log
> # bad: [f5583dd12e6fc8a3c11ae732f38bce8334e150a2] Linux 5.4.62-rc1
> # good: [6576d69aac94cd8409636dfa86e0df39facdf0d2] Linux 5.4.61
> git bisect start 'HEAD' 'v5.4.61'
> # good: [6c747bd0794c982b500bda7334ef55d9dabb6cc6] nvme-fc: Fix wrong ret=
urn value in __nvme_fc_init_request()
> git bisect good 6c747bd0794c982b500bda7334ef55d9dabb6cc6
> # bad: [81b5698e6d9ecdc9569df8f4b93be70d587f5ddf] serial: samsung: Remove=
s the IRQ not found warning
> git bisect bad 81b5698e6d9ecdc9569df8f4b93be70d587f5ddf
> # bad: [973679736caa8e1b39b68866535bdc7899a46f25] ASoC: wm8994: Avoid att=
empts to read unreadable registers
> git bisect bad 973679736caa8e1b39b68866535bdc7899a46f25
> # good: [1789df2a787c589dbe83bc3ed52af2abbc739d1b] ext4: correctly restor=
e system zone info when remount fails
> git bisect good 1789df2a787c589dbe83bc3ed52af2abbc739d1b
> # good: [ba1fb0301a60cbded377e0f312c82847415a1820] drm/amd/powerplay: cor=
rect UVD/VCE PG state on custom pptable uploading
> git bisect good ba1fb0301a60cbded377e0f312c82847415a1820
> # bad: [1ef070d29e73a50e98a93d9a68f69cfef4247170] netfilter: avoid ipv6 -=
> nf_defrag_ipv6 module dependency
> git bisect bad 1ef070d29e73a50e98a93d9a68f69cfef4247170
> # bad: [401834f55ce7f86bf2c0f8fdd8fbf9e1baf19f1c] libbpf: Handle GCC buil=
t-in types for Arm NEON
> git bisect bad 401834f55ce7f86bf2c0f8fdd8fbf9e1baf19f1c
> # good: [ccb6e88cd42a9cb65bde705f7f8e7c9822dcb711] drm/amd/display: Switc=
h to immediate mode for updating infopackets
> git bisect good ccb6e88cd42a9cb65bde705f7f8e7c9822dcb711
> # first bad commit: [401834f55ce7f86bf2c0f8fdd8fbf9e1baf19f1c] libbpf: Ha=
ndle GCC built-in types for Arm NEON

[1] https://lore.kernel.org/stable/CA+G9fYvsNkxvs7hdCB3LC9W+rP8hBa3F1fG3951=
S+xHfiOJwNA@mail.gmail.com/

- Naresh