# git rev-parse -q --verify 5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc^{commit}
5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc
# git clean -qxdf
# < git log -1
# commit 5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc
# Merge: 42dc45e84452 5149303fdfe5
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Dec 25 11:07:34 2020 -0800
# 
#     Merge tag 'perf-tools-2020-12-24' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
#     
#     Pull more perf tools updates from Arnaldo Carvalho de Melo:
#     
#      - Refactor 'perf stat' per CPU/socket/die/thread aggregation fixing use
#        cases in ARM machines.
#     
#      - Fix memory leak when synthesizing SDT probes in 'perf probe'.
#     
#      - Update kernel header copies related to KVM, epol_pwait. msr-index and
#        powerpc and s390 syscall tables.
#     
#     * tag 'perf-tools-2020-12-24' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (24 commits)
#       perf probe: Fix memory leak when synthesizing SDT probes
#       perf stat aggregation: Add separate thread member
#       perf stat aggregation: Add separate core member
#       perf stat aggregation: Add separate die member
#       perf stat aggregation: Add separate socket member
#       perf stat aggregation: Add separate node member
#       perf stat aggregation: Start using cpu_aggr_id in map
#       perf cpumap: Drop in cpu_aggr_map struct
#       perf cpumap: Add new map type for aggregation
#       perf stat: Replace aggregation ID with a struct
#       perf cpumap: Add new struct for cpu aggregation
#       perf cpumap: Use existing allocator to avoid using malloc
#       perf tests: Improve topology test to check all aggregation types
#       perf tools: Update s390's syscall.tbl copy from the kernel sources
#       perf tools: Update powerpc's syscall.tbl copy from the kernel sources
#       perf s390: Move syscall.tbl check into check-headers.sh
#       perf powerpc: Move syscall.tbl check to check-headers.sh
#       tools headers UAPI: Synch KVM's svm.h header with the kernel
#       tools kvm headers: Update KVM headers from the kernel sources
#       tools headers UAPI: Sync KVM's vmx.h header with the kernel sources
#       ...
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 5814bc2d4cc241c1a603fac2b5bf1bd4daa108fc
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0x6D454138
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
/kisskb/src/arch/arm64/kernel/smp.c: In function 'arch_show_interrupts':
/kisskb/src/arch/arm64/kernel/smp.c:810:16: warning: unused variable 'irq' [-Wunused-variable]
   unsigned int irq = irq_desc_get_irq(ipi_desc[i]);
                ^

Auto-detecting system features:
...                        libelf: [ OFF ]
...                          zlib: [ OFF ]
...                           bpf: [ on  ]

No libelf found
make[5]: *** [Makefile:287: elfdep] Error 1
make[4]: *** [/kisskb/src/kernel/bpf/preload/Makefile:8: kernel/bpf/preload/libbpf.a] Error 2
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:496: kernel/bpf/preload] Error 2
make[2]: *** [/kisskb/src/scripts/Makefile.build:496: kernel/bpf] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4
# Build took: 0:04:42.664402