NETATOP: Kernels with IBT will fail to compile #351
Description
make -j4 -l6 ARCH=x86 V=1 KBUILD_VERBOSE=1 CONFIG_WERROR= CONFIG_OBJTOOL_WERROR= CONFIG_MODULE_SIG_ALL= CONFIG_MODULE_COMPRESS_ALL= CONFIG_MODULE_COMPRESS_GZIP= CONFIG_MODULE_COMPRESS_XZ= CONFIG_MODULE_COMPRESS_ZSTD= DEPMOD=true STRIP=true CROSS_COMPILE=x86_64-pc-linux-gnu- HOSTCC=clang HOSTCXX=clang++ 'HOSTCFLAGS=-I/usr/local/include -march=native -O3 -pipe -fno-plt -fno-semantic-interposition' 'HOSTCXXFLAGS=-I/usr/local/include -march=native -O3 -pipe -fno-plt -fno-semantic-interposition' 'HOSTLDFLAGS=-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -fuse-ld=lld -rtlib=compiler-rt -unwindlib=libunwind' HOSTPKG_CONFIG=x86_64-pc-linux-gnu-pkg-config CC=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-clang-20 CXX=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-clang++-20 LD=/var/tmp/portage/sys-process/atop-2.12.0/temp/linux-mod-r1_ld.lld AR=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-ar NM=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-nm OBJCOPY=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-objcopy OBJDUMP=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-objdump READELF=/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-readelf netatop.ko
make -C /lib/modules/6.17.2-gentoo-eevdf-bore/build M=/var/tmp/portage/sys-process/atop-2.12.0/work/netatop-3.2.2 modules
make[1]: Entering directory '/usr/src/linux-git'
make -C /var/tmp/portage/sys-process/atop-2.12.0/work/netatop-3.2.2 \
-f /usr/src/linux-git/Makefile modules
make[2]: Entering directory '/var/tmp/portage/sys-process/atop-2.12.0/work/netatop-3.2.2'
make --no-print-directory -C /var/tmp/portage/sys-process/atop-2.12.0/work/netatop-3.2.2 \
-f /usr/src/linux-git/Makefile modules
make -f /usr/src/linux-git/scripts/Makefile.build obj=. need-builtin=1 need-modorder=1
# cmd_mod netatop.mod
printf '%s\n' netatop.o | awk '!x[$0]++ { print("./"$0) }' > netatop.mod
# CC [M] netatop.o
/usr/lib/llvm/20/bin/x86_64-pc-linux-gnu-clang-20 -Wp,-MMD,./.netatop.o.d -nostdinc -I/usr/src/linux-git/arch/x86/include -I/usr/src/linux-git/arch/x86/include/generated -I/usr/src/linux-git/include -I/usr/src/linux-git/include -I/usr/src/linux-git/arch/x86/include/uapi -I/usr/src/linux-git/arch/x86/include/generated/uapi -I/usr/src/linux-git/include/uapi -I/usr/src/linux-git/include/generated/uapi -include /usr/src/linux-git/include/linux/compiler-version.h -include /usr/src/linux-git/include/linux/kconfig.h -include /usr/src/linux-git/include/linux/compiler_types.h -D__KERNEL__ --target=x86_64-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=branch -fno-jump-tables -m64 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mstack-alignment=8 -mskip-rax-setup -march=native -mno-red-zone -mcmodel=kernel -mstack-protector-guard-reg=gs -mstack-protector-guard-symbol=__ref_stack_chk_guard -Wno-sign-compare -fno-asynchronous-unwind-tables -mretpoline-external-thunk -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fpatchable-function-entry=16,16 -fno-delete-null-pointer-checks -O3 -fstack-protector-strong -fno-stack-clash-protection -pg -mfentry -DCC_USING_NOP_MCOUNT -DCC_USING_FENTRY -fno-lto -flto=thin -fsplit-lto-unit -fvisibility=hidden -falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=2048 -Wno-gnu -Wno-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-pointer-sign -Wcast-function-type -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-format-overflow -Wno-override-init -Wno-pointer-to-enum-cast -Wno-tautological-constant-out-of-range-compare -Wno-unaligned-access -Wno-enum-compare-conditional -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -DMODULE -DKBUILD_BASENAME='"netatop"' -DKBUILD_MODNAME='"netatop"' -D__KBUILD_MODNAME=kmod_netatop -c -o netatop.o netatop.c ; /var/tmp/portage/sys-process/atop-2.12.0/temp/linux-mod-r1_ld.lld -m elf_x86_64 -mllvm -import-instr-limit=5 -z noexecstack -r -o ./.tmp_netatop.o netatop.o; mv ./.tmp_netatop.o netatop.o ; /usr/src/linux-git/tools/objtool/objtool --hacks=jump_label --hacks=noinstr --hacks=skylake --ibt --mcount --mnop --orc --retpoline --rethunk --static-call --uaccess --prefix=16 --link --module netatop.o
�[1mnetatop.c:1665:6: �[0m�[0;1;35mwarning: �[0m�[1munannotated fall-through between switch labels [-Wimplicit-fallthrough]�[0m
1665 | �[0;34mcase�[0m NETATOP_GETCNT_PID:�[0m
| �[0;1;32m ^
�[0m�[1mnetatop.c:1665:6: �[0m�[0;1;36mnote: �[0minsert '__attribute__((fallthrough));' to silence this warning�[0m
1665 | �[0;34mcase�[0m NETATOP_GETCNT_PID:�[0m
| �[0;1;32m ^
�[0m | �[0;32m __attribute__((fallthrough));
�[0m�[1mnetatop.c:1665:6: �[0m�[0;1;36mnote: �[0minsert 'break;' to avoid fall-through�[0m
1665 | �[0;34mcase�[0m NETATOP_GETCNT_PID:�[0m
| �[0;1;32m ^
�[0m | �[0;32m break;
�[0m1 warning generated.
netatop.o: error: objtool: init_module(): Magic init_module() function name is deprecated, use module_init(fn) instead
make[4]: *** [/usr/src/linux-git/scripts/Makefile.build:287: netatop.o] Error 255
make[4]: *** Deleting file 'netatop.o'
make[3]: *** [/usr/src/linux-git/Makefile:2011: .] Error 2
make[2]: *** [/usr/src/linux-git/Makefile:248: __sub-make] Error 2
make[2]: Leaving directory '/var/tmp/portage/sys-process/atop-2.12.0/work/netatop-3.2.2'
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-git'
make: *** [Makefile:13: netatop.ko] Error 2
The commit that gives the error message.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.17.2&id=4fab2d7628dd38f3fa8a5e615199350ecaeb17a8