+ if [ "$?" -gt 1 ] ; then
+ echo "Serious issue patching"
+ exit 1
+ fi
+}
+
+build_linux_kernel() {
+ cd "$LINUX_SRCOBJ_DIR"
+
+ kversion=$(make -s kernelversion "${make_args[@]}")
+ pahole_version="$(pahole --version | tr -d 'v')"
+
+ if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
+ # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
+ if { verlt "${kversion}" "3.2"; } ; then
+ vanilla_config='mx5_defconfig'
+ else
+ vanilla_config='mx51_defconfig'
+ fi
+ fi
+
+ if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
+ # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
+ vanilla_config='pseries_defconfig'
+ fi
+
+ # Generate kernel configuration
+ case "$ktag" in
+ *el*)
+ # Copy the EL kernel configuration
+ el_arch="${cross_arch:-$arch}"
+ case "${el_arch}" in
+ amd64)
+ el_arch=x86_64
+ ;;
+ arm64)
+ el_arch=aarch64
+ ;;
+ ppc64el)
+ el_arch=ppc64le
+ ;;
+ *)
+ ;;
+ esac
+ ls "${WORKSPACE}/src/linux-rpm/SOURCES/"
+ if [ -f "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}.config" ] ; then
+ cp "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}.config" .config
+ elif [ -f "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}-rhel.config" ] ; then
+ cp "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}-rhel.config" .config
+ fi
+
+ # Eg.
+ # mm/mempolicy.c: In function ‘mpol_parse_str’:
+ # mm/mempolicy.c:2980:26: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
+ export KCFLAGS="${KCFLAGS} -Wno-error -Wno-all -Wno-error=stringop-overflow -Wno-error=address-of-packed-member"
+ ;;
+
+ Ubuntu*)
+ if [ "${cross_arch}" = "powerpc" ] && vergte "${kversion}" "4.10"; then
+ echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
+ exit 0
+ fi
+
+ if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then
+ echo "Ubuntu added RISC-V config to their 'regular' kernels in v6.2. Don't try to build it."
+ exit 0
+ fi
+
+ FAKEROOT_ARGS=(
+ 'KW_DEFCONFIG_DIR=.'
+ )
+ fakeroot debian/rules clean "${FAKEROOT_ARGS[@]}"
+
+ # Hack for kernel Ubuntu-hwe-5.8
+ # The debian/control file is produced by the clean target above, so this
+ # check needs to happen afterwards.
+ if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
+ echo "10" > "debian/compat"
+ fi
+
+ # genconfigs check can fail in certain cases, eg. when a more recent
+ # compiler exposes kernel configuration flags which aren't set in the
+ # Ubuntu annotations.
+ # In any case, the configuration will be updated with any missing values
+ # later in our build script.
+ FAKEROOT_ARGS+=('do_skip_checks=true')
+
+ # Some Ubuntu tags default the toolchain using `gcc?=gcc-XX` in
+ # `debian/rules.d/0-common-vars.mk`. This may fail if the gcc version
+ # used as a default isn't available.
+ # For example, Ubuntu-6.8.0-7.7 sets `gcc?=gcc-13`, and that version
+ # of gcc isn't available on the deb12-amd64 ci-nodes.
+ # Work has also already been done in `select_compiler` to make our
+ # own decision of which compiler to use. As a result of both cases,
+ # our compiler choice should be passed into genconfigs.
+ FAKEROOT_ARGS+=("gcc=${selected_cc}")
+
+ fakeroot debian/rules genconfigs "${FAKEROOT_ARGS[@]}"
+ cp CONFIGS/"${ubuntu_config}" .config
+ ;;
+
+ *)
+ # Force 32bit build on i386, default is 64bit
+ if [ "$arch" = "i386" ]; then
+ export ARCH="i386"
+ fi
+
+ make "${vanilla_config}" "${make_args[@]}"
+ ;;
+ esac
+
+ if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
+ # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
+ scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
+ scripts/config --enable CONFIG_CMA
+ scripts/config --disable CONFIG_XMON_DEFAULT
+ # scripts/config --disable CONFIG_VIRTUALIZATION
+ # scripts/config --disable CONFIG_KVM_BOOK3S_64
+ scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
+ fi
+
+ if [ -f "init/Kconfig.suse" ] ; then
+ # Get values from git tag, eg. 'rpm-5.14.21-150400.24.108'
+ # Note: the "150400" type of SUSE major version is only present on tags
+ # from 2022 and newer (about half-way through SLE15SP3).
+ # This will not work as expected on earlier tags.
+ SLES_RELEASE="$(echo "${ktag}" | cut -d '-' -f 3 | cut -d'.' -f 1)"
+ scripts/config --set-val CONFIG_SUSE_VERSION $((10#"$(echo "${SLES_RELEASE}" | head -c 2)"))
+ scripts/config --set-val CONFIG_SUSE_PATCHLEVEL $((10#"$(echo "${SLES_RELEASE}" | head -c 4 | tail -c 2)"))
+
+ # Disable the renesas clk driver that has build issues,
+ # eg. drivers/clk/renesas/renesas-rzg2l-cpg.c:185:17: error: ‘clk’ undeclared (first use in this function)
+ scripts/config --disable CONFIG_CLK_RENESAS
+
+ # From drives/spi/spi-atmel.c
+ # ./include/linux/gpio/consumer.h:141:49: note: expected ‘struct gpio_desc *’ but argument is of type 'int'
+ scripts/config --disable CONFIG_SPI_ATMEL
+ scripts/config --disable CONFIG_SPI_AT91_USART
+ scripts/config --disable CONFIG_SPI_ATMEL_QUADSPI
+
+ # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c: In function ‘mt7915_tm_set_wmm_qid’:
+ # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:176:30: error: ‘struct mt7915_vif’ has no member named ‘mt76’
+ scripts/config --disable CONFIG_WLAN_VENDOR_MEDIATEK
+
+ # drivers/net/wireless/microchip/wilc1000/cfg80211.c: In function ‘wilc_wfi_cfg_parse_ch_attr’:
+ # drivers/net/wireless/microchip/wilc1000/cfg80211.c:970:17: error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode
+ scripts/config --disable CONFIG_WLAN_VENDOR_MICROCHIP
+
+ # fs/f2fs/file.c: In function ‘punch_hole’:
+ # fs/f2fs/file.c:1093:49: error: ‘mapping’ undeclared (first use in this function)
+ scripts/config --disable CONFIG_F2FS_FS
+ fi
+
+ # oldnoconfig was renamed in 4.19
+ if vergte "$kversion" "4.19"; then
+ update_conf_target="olddefconfig"
+ else
+ update_conf_target="oldnoconfig"
+ fi
+
+ # Fix 'defined(@array)' was removed from recent perl
+ if [ -f "kernel/timeconst.pl" ]; then
+ sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
+ fi
+
+ # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
+ if [ "$HOSTCC" != "gcc-4.8" ]; then
+ if [ -f "arch/x86/kvm/svm.c" ]; then
+ sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
+ fi
+
+ if [ -f "arch/x86/kvm/vmx.c" ]; then
+ sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
+ fi
+ fi
+
+ if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
+ # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
+ # in certain cases when files are empty.
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
+ #
+ # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
+ # therefore patching tools/objtool/elf.c is attempted.
+ patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
+ if { verlt "${kversion}" "4.18"; } ; then
+ patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
+ fi
+ fi
+
+ if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
+ # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
+ if { verlt "${kversion}" "4.16"; } ; then
+ # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
+ # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
+ patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
+ fi
+ if { verlt "${kversion}" "4.17"; } ; then
+ # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
+ # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
+ patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
+ fi
+
+ fi
+
+ if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
+ # Duplicate decalarations of __force_order
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
+ # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
+ if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
+ sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
+ fi
+ if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
+ patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
+ fi
+ fi
+
+ if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
+ # In some cases, compiling net/bpfilter can fail with the following error:
+ # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
+ # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
+ #
+ # While the issue is potentially in a number of old versions, it has only
+ # been observed in v4.18-rt
+ #
+ patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
+ fi
+
+ if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
+ # In some cases, compiling net/bpfilter can fail with the following error:
+ # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
+ # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
+ #
+ # While the issue is potentially in a number of old versions, it has only
+ # been observed in v4.18-rt
+ #
+ patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
+ fi
+
+ if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
+ # Some old kernels fail to build when make is too new
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
+ patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
+ fi
+
+ if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
+ # Some old kernels fail to build when make is too new
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
+ patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
+ fi
+
+ if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
+ ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
+ # Some old kernels fail to build when make is too new
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
+ patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
+ fi
+
+ if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
+ ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
+ # Old kernels can fail to build while on newer host kernels with errors
+ # such as:
+ # In file included from scripts/selinux/genheaders/genheaders.c:19:
+ # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
+ #
+ patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
+ fi
+
+ # Compatibility with binutils >= ~ 2.31
+ if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
+ patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
+ fi
+ if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
+ patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
+ fi
+ if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
+ patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
+ patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
+ fi
+ if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
+ patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
+ fi
+
+ if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
+ ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
+ # While the original motivation of this patch is for fixing builds using
+ # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
+ # 4.15, 4.16.
+ # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
+ #
+ # This patch only partially applies due to changes in kernel/Makefile,
+ # so a supplementary patch is needed
+ #
+ # Without this patch, builds fail with
+ # Cannot find symbol for section 2: .text.
+ # kernel/elfcore.o: failed
+ #
+ # @see https://github.com/linuxppc/issues/issues/388
+ # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
+ #
+ patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
+ if grep -q elfcore.o kernel/Makefile ; then
+ sed -i '/^.* += elfcore.o$/d' kernel/Makefile
+ fi
+ fi
+ # Same as above for the v4.4 branch
+ if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
+ patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
+ if grep -q elfcore.o kernel/Makefile ; then
+ sed -i '/^.* += elfcore.o$/d' kernel/Makefile
+ fi
+ fi
+
+ if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
+ # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
+ # assembler error :
+ #
+ # kernel/.tmp_fork.s: Assembler messages:
+ # kernel/.tmp_fork.s:1790: Error: .err encountered
+ #
+ # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
+ #
+ patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
+ fi
+
+ if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
+ ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
+ # Hacky patch to deal with the following build error:
+ # Cannot find symbol for section 7: .text.unlikely.
+ # kernel/kexec_file.o: failed
+ # make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
+ #
+ # This error happens with binutils 2.36 and 2.37, but should probably not
+ # be an issue with binutils 2.38.
+ # @see https://github.com/linuxppc/issues/issues/388
+ # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
+ #
+ # There is some sort of config (unspecified in past discussions) which
+ # provokes the error, and there was never a potential fix merged in
+ # this discussion, in part because the build systems of the kernel
+ # switched to objtool instead.
+ #
+ # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
+ #
+ sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
+
+ # After applying the above patch, the build continues but fails with
+ # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
+ #
+ scripts/config --disable CONFIG_GCOV_KERNEL
+ fi
+
+ if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
+ # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
+ patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
+ fi
+
+ # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
+ # Convert them to 'cmpw' which was previously done silently
+ if verlt "$kversion" "4.9"; then
+ find arch/powerpc/ -name "*.S" -print0 | xargs -0 sed -i "s/\(cmp\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmpw\2/"
+ find arch/powerpc/ -name "*.S" -print0 | xargs -0 sed -i "s/\(cmpli\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmplwi\2/"
+ sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
+ fi
+
+ if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
+ ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
+ # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
+ # extcon-adc-jack.h has an incompatible pointer type.
+ # In GCC >= 5 this will provoke a warning and build failure.
+ # Eg.
+ # drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
+ # drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
+ # make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
+ #
+ # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
+ #
+ patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
+ fi
+
+ if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
+ ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
+ # Fix an objtool Segmentation fault
+ patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
+ fi
+
+ if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
+ # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
+ patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
+ fi
+
+ # Fix a typo in v2.6.36.x
+ if [ -f "arch/x86/kernel/entry_64.S" ]; then
+ sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
+ fi
+
+ # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
+ if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
+ sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
+ sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
+ fi
+
+ # Fix kernel < 3.0 with gcc >= 4.7
+ if verlt "$kversion" "3.0"; then
+ sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
+ sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
+ sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
+ echo "header-y += linkage.h" >> include/linux/Kbuild
+ fi
+
+ if [ "${cross_arch}" = "powerpc" ] ; then
+ if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
+ # Avoid register errors such as
+ # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
+ make_args+=(
+ CFLAGS_aes_generic.o=''
+ )
+ fi
+ fi