Re: [PATCH 5.4 000/214] 5.4.62-rc1 review

[Guenter Roeck]

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 from 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 = 5.4.61.gf5583dd12e6f
In file included from btf_dump.c:16:0:
btf_dump.c: In function ‘btf_align_of’:
tools/include/linux/kernel.h:53:17: error: comparison of distinct pointer types lacks a cast [-Werror]
  (void) (&_min1 == &_min2);  \
                 ^
btf_dump.c:770:10: note: in expansion of macro ‘min’
   return min(sizeof(void *), t->size);
          ^~~
cc1: all warnings being treated as errors
make[7]: *** [/tmp/buildbot-builddir/tools/perf/staticobjs/btf_dump.o] Error 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 return value in __nvme_fc_init_request()
git bisect good 6c747bd0794c982b500bda7334ef55d9dabb6cc6
# bad: [81b5698e6d9ecdc9569df8f4b93be70d587f5ddf] serial: samsung: Removes the IRQ not found warning
git bisect bad 81b5698e6d9ecdc9569df8f4b93be70d587f5ddf
# bad: [973679736caa8e1b39b68866535bdc7899a46f25] ASoC: wm8994: Avoid attempts to read unreadable registers
git bisect bad 973679736caa8e1b39b68866535bdc7899a46f25
# good: [1789df2a787c589dbe83bc3ed52af2abbc739d1b] ext4: correctly restore system zone info when remount fails
git bisect good 1789df2a787c589dbe83bc3ed52af2abbc739d1b
# good: [ba1fb0301a60cbded377e0f312c82847415a1820] drm/amd/powerplay: correct 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 built-in types for Arm NEON
git bisect bad 401834f55ce7f86bf2c0f8fdd8fbf9e1baf19f1c
# good: [ccb6e88cd42a9cb65bde705f7f8e7c9822dcb711] drm/amd/display: Switch to immediate mode for updating infopackets
git bisect good ccb6e88cd42a9cb65bde705f7f8e7c9822dcb711
# first bad commit: [401834f55ce7f86bf2c0f8fdd8fbf9e1baf19f1c] libbpf: Handle GCC built-in types for Arm NEON