# git gc
# git rev-parse -q --verify c4d7f40b250c1a4d74ed259e84807f58032507b6^{commit}
c4d7f40b250c1a4d74ed259e84807f58032507b6
already have revision, skipping fetch
# git checkout -q -f -B kisskb c4d7f40b250c1a4d74ed259e84807f58032507b6
# git clean -qxdf
# < git log -1
# commit c4d7f40b250c1a4d74ed259e84807f58032507b6
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Mon Jan 10 03:15:29 2022 +0900
# 
#     kbuild: add cmd_file_size
#     
#     Some architectures support self-extracting kernel, which embeds the
#     compressed vmlinux.
#     
#     It has 4 byte data at the end so the decompressor can know the vmlinux
#     size beforehand.
#     
#     GZIP natively has it in the trailer, but for the other compression
#     algorithms, the hand-crafted trailer is added.
#     
#     It is unneeded to generate such _corrupted_ compressed files because
#     it is possible to pass the size data as a separate file.
#     
#     For example, the assembly code:
#     
#          .incbin "compressed-vmlinux-with-size-data"
#     
#     can be transformed to:
#     
#          .incbin "compressed-vmlinux"
#          .incbin "size-data"
#     
#     My hope is, after some reworks of the decompressors, the macros
#     cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}_with_size will go away.
#     
#     This new macro, cmd_file_size, will be useful to generate a separate
#     size-data file.
#     
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
#     Reviewed-by: Nicolas Schier <n.schier@avm.de>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 c4d7f40b250c1a4d74ed259e84807f58032507b6
# < make -s -j 48 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# < make -s -j 48 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 48 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 48 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
vmlinux.o: warning: objtool: __do_fast_syscall_32()+0xa: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: do_syscall_64()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: do_int80_syscall_32()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: exc_general_protection()+0x22: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: fixup_bad_iret()+0x20: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: mce_setup()+0x18: call to memset() leaves .noinstr.text section
vmlinux.o: warning: objtool: do_machine_check()+0x27: call to stackleak_track_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: .entry.text+0x10e6: call to stackleak_erase() leaves .noinstr.text section
vmlinux.o: warning: objtool: .entry.text+0x143: call to stackleak_erase() leaves .noinstr.text section
vmlinux.o: warning: objtool: .entry.text+0x17d9: call to stackleak_erase() leaves .noinstr.text section
Completed OK
# rm -rf /kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc11
# Build took: 0:38:21.689889