# git rev-parse -q --verify f6e1ea19649216156576aeafa784e3b4cee45549^{commit}
f6e1ea19649216156576aeafa784e3b4cee45549
already have revision, skipping fetch
# git checkout -q -f -B kisskb f6e1ea19649216156576aeafa784e3b4cee45549
# git clean -qxdf
# < git log -1
# commit f6e1ea19649216156576aeafa784e3b4cee45549
# Merge: 139711f033f6 664f1e259a98
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Dec 30 12:02:12 2020 -0800
# 
#     Merge tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client
#     
#     Pull ceph fixes from Ilya Dryomov:
#      "A fix for an edge case in MClientRequest encoding and a couple of
#       trivial fixups for the new msgr2 support"
#     
#     * tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client:
#       libceph: add __maybe_unused to DEFINE_MSGR2_FEATURE
#       libceph: align session_key and con_secret to 16 bytes
#       libceph: fix auth_signature buffer allocation in secure mode
#       ceph: reencode gid_list when reconnecting
# < /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 f6e1ea19649216156576aeafa784e3b4cee45549
# < make -s -j 10 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 10 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 10 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:4498:warning: override: reassigning to symbol GCC_PLUGIN_CYC_COMPLEXITY
.config:4500:warning: override: reassigning to symbol GCC_PLUGIN_LATENT_ENTROPY
.config:4504:warning: override: reassigning to symbol UML_NET_ETHERTAP
.config:4506:warning: override: reassigning to symbol UML_NET_SLIP
.config:4509:warning: override: reassigning to symbol UML_NET_MCAST
.config:4511:warning: override: reassigning to symbol UML_NET_SLIRP
# make -s -j 10 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 

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[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....
/kisskb/src/drivers/rtc/rtc-rx6110.c:314:12: warning: 'rx6110_probe' defined but not used [-Wunused-function]
 static int rx6110_probe(struct rx6110_data *rx6110, struct device *dev)
            ^
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 10 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: 0:06:51.163080