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Reply-To: dgilbert@interlog.com
To:     linux-kernel <linux-kernel@vger.kernel.org>
From:   Douglas Gilbert <dgilbert@interlog.com>
Subject: tools/perf: noise from check-headers.sh
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>
Message-ID: <849974e5-e8b8-d885-e993-a373d9c675bd@interlog.com>
Date:   Wed, 28 Oct 2020 20:40:02 -0400
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Executing that script in linux-stable [lk 5.10.0-rc1] gives the following
output:

Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from 
latest version at 'include/uapi/drm/i915_drm.h'
diff -u tools/include/uapi/drm/i915_drm.h include/uapi/drm/i915_drm.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/fscrypt.h' differs from 
latest version at 'include/uapi/linux/fscrypt.h'
diff -u tools/include/uapi/linux/fscrypt.h include/uapi/linux/fscrypt.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from 
latest version at 'include/uapi/linux/kvm.h'
diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/mount.h' differs from 
latest version at 'include/uapi/linux/mount.h'
diff -u tools/include/uapi/linux/mount.h include/uapi/linux/mount.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs 
from latest version at 'include/uapi/linux/perf_event.h'
diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from 
latest version at 'include/uapi/linux/prctl.h'
diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/disabled-features.h' 
differs from latest version at 'arch/x86/include/asm/disabled-features.h'
diff -u tools/arch/x86/include/asm/disabled-features.h 
arch/x86/include/asm/disabled-features.h
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/required-features.h' 
differs from latest version at 'arch/x86/include/asm/required-features.h'
diff -u tools/arch/x86/include/asm/required-features.h 
arch/x86/include/asm/required-features.h
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs 
from latest version at 'arch/x86/include/asm/cpufeatures.h'
diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/msr-index.h' differs 
from latest version at 'arch/x86/include/asm/msr-index.h'
diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h
Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/kvm.h' differs 
from latest version at 'arch/x86/include/uapi/asm/kvm.h'
diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h
Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/svm.h' differs 
from latest version at 'arch/x86/include/uapi/asm/svm.h'
diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h
Warning: Kernel ABI header at 'tools/arch/s390/include/uapi/asm/sie.h' differs 
from latest version at 'arch/s390/include/uapi/asm/sie.h'
diff -u tools/arch/s390/include/uapi/asm/sie.h arch/s390/include/uapi/asm/sie.h
Warning: Kernel ABI header at 'tools/arch/arm64/include/uapi/asm/kvm.h' differs 
from latest version at 'arch/arm64/include/uapi/asm/kvm.h'
diff -u tools/arch/arm64/include/uapi/asm/kvm.h arch/arm64/include/uapi/asm/kvm.h
Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/unistd.h' differs 
from latest version at 'include/uapi/asm-generic/unistd.h'
diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
Warning: Kernel ABI header at 'tools/include/uapi/linux/mman.h' differs from 
latest version at 'include/uapi/linux/mman.h'
diff -u tools/include/uapi/linux/mman.h include/uapi/linux/mman.h
Warning: Kernel ABI header at 
'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version 
at 'arch/x86/entry/syscalls/syscall_64.tbl'
diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl 
arch/x86/entry/syscalls/syscall_64.tbl
Warning: Kernel ABI header at 'tools/perf/util/hashmap.h' differs from latest 
version at 'tools/lib/bpf/hashmap.h'
diff -u tools/perf/util/hashmap.h tools/lib/bpf/hashmap.h
Warning: Kernel ABI header at 'tools/perf/util/hashmap.c' differs from latest 
version at 'tools/lib/bpf/hashmap.c'
diff -u tools/perf/util/hashmap.c tools/lib/bpf/hashmap.c


There was a bit of noise in lk 5.9.0-rc1 but it is considerably worse now.

Doug Gilbert