# git rev-parse -q --verify e994cc240a3b75744c33ca9b8d74f71f0fcd8852^{commit}
e994cc240a3b75744c33ca9b8d74f71f0fcd8852
already have revision, skipping fetch
# git checkout -q -f -B kisskb e994cc240a3b75744c33ca9b8d74f71f0fcd8852
# git clean -qxdf
# < git log -1
# commit e994cc240a3b75744c33ca9b8d74f71f0fcd8852
# Merge: ba1d41a55e4d 2c07343abd89
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Dec 16 11:30:10 2020 -0800
# 
#     Merge tag 'seccomp-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
#     
#     Pull seccomp updates from Kees Cook:
#      "The major change here is finally gaining seccomp constant-action
#       bitmaps, which internally reduces the seccomp overhead for many
#       real-world syscall filters to O(1), as discussed at Plumbers this
#       year.
#     
#        - Improve seccomp performance via constant-action bitmaps (YiFei Zhu
#          & Kees Cook)
#     
#        - Fix bogus __user annotations (Jann Horn)
#     
#        - Add missed CONFIG for improved selftest coverage (Mickaël Salaün)"
#     
#     * tag 'seccomp-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
#       selftests/seccomp: Update kernel config
#       seccomp: Remove bogus __user annotations
#       seccomp/cache: Report cache data through /proc/pid/seccomp_cache
#       xtensa: Enable seccomp architecture tracking
#       sh: Enable seccomp architecture tracking
#       s390: Enable seccomp architecture tracking
#       riscv: Enable seccomp architecture tracking
#       powerpc: Enable seccomp architecture tracking
#       parisc: Enable seccomp architecture tracking
#       csky: Enable seccomp architecture tracking
#       arm: Enable seccomp architecture tracking
#       arm64: Enable seccomp architecture tracking
#       selftests/seccomp: Compare bitmap vs filter overhead
#       x86: Enable seccomp architecture tracking
#       seccomp/cache: Add "emulator" to check if filter is constant allow
#       seccomp/cache: Lookup syscall allowlist bitmap for fast path
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 e994cc240a3b75744c33ca9b8d74f71f0fcd8852
# < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allmodconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_KCOV=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n
# Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n
# Added to kconfig CONFIG_UML_NET=n
# Added to kconfig CONFIG_UML_NET_ETHERTAP=n
# Added to kconfig CONFIG_UML_NET_TUNTAP=n
# Added to kconfig CONFIG_UML_NET_SLIP=n
# Added to kconfig CONFIG_UML_NET_DAEMON=n
# Added to kconfig CONFIG_UML_NET_VDE=n
# Added to kconfig CONFIG_UML_NET_MCAST=n
# Added to kconfig CONFIG_UML_NET_PCAP=n
# Added to kconfig CONFIG_UML_NET_SLIRP=n
# Added to kconfig CONFIG_GCOV_KERNEL=n
# Added to kconfig CONFIG_DEBUG_INFO_BTF=n
# < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
.config:4377:warning: override: reassigning to symbol GCC_PLUGIN_CYC_COMPLEXITY
.config:4379:warning: override: reassigning to symbol GCC_PLUGIN_LATENT_ENTROPY
.config:4383:warning: override: reassigning to symbol UML_NET_ETHERTAP
.config:4385:warning: override: reassigning to symbol UML_NET_SLIP
.config:4388:warning: override: reassigning to symbol UML_NET_MCAST
.config:4390:warning: override: reassigning to symbol UML_NET_SLIRP
# make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/os-Linux/signal.c: In function 'sig_handler_common':
/kisskb/src/arch/um/os-Linux/signal.c:51:1: warning: the frame size of 2976 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/arch/um/os-Linux/signal.c: In function 'timer_real_alarm_handler':
/kisskb/src/arch/um/os-Linux/signal.c:95:1: warning: the frame size of 2960 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^

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[3]: *** [/kisskb/src/scripts/Makefile.build:496: kernel/bpf/preload] Error 2
make[3]: *** Waiting for unfinished jobs....
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 48 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_um-allmodconfig_um-x86_64
# Build took: 0:04:56.169580