+ # 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;$/d' arch/x86/boot/compressed/pagetable.c
+ fi
+ fi
+
+ if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
+ # Some old kernels fail to build when make is too new
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
+ patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
+ patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
+ fi
+
+ if { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.19"; } ; then
+ # Old kernels can fail to build while on newer host kernels with errors
+ # such as:
+ # In file included from scripts/selinux/genheaders/genheaders.c:19:
+ # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
+ # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
+ #
+ patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
+ fi
+
+ if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.4"; } ; then
+ # Compatibility with binutils >= ~ 2.31
+ patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
+ fi
+
+ # The above patch only partially applies linux 3.17, and has been, so a
+ # rebased version is used instead.
+ if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
+ cat <<'EOF' | patch -p1
+diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
+index 48598105..0652c5b6 100644
+--- a/arch/x86/kernel/machine_kexec_64.c
++++ b/arch/x86/kernel/machine_kexec_64.c
+@@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
+ goto overflow;
+ break;
+ case R_X86_64_PC32:
++ case R_X86_64_PLT32:
+ value -= (u64)address;
+ *(u32 *)location = value;
+ break;
+diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
+index e69f9882..7c6bc9fe 100644
+--- a/arch/x86/kernel/module.c
++++ b/arch/x86/kernel/module.c
+@@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
+ goto overflow;
+ break;
+ case R_X86_64_PC32:
++ case R_X86_64_PLT32:
+ val -= (u64)loc;
+ *(u32 *)loc = val;
+ #if 0
+diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
+index bbb1d225..8deeacbc 100644
+--- a/arch/x86/tools/relocs.c
++++ b/arch/x86/tools/relocs.c
+@@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
+ switch (r_type) {
+ case R_X86_64_NONE:
+ case R_X86_64_PC32:
++ case R_X86_64_PLT32:
+ /*
+ * NONE can be ignored and PC relative relocations don't
+ * need to be adjusted.
+EOF
+ fi
+
+ if ( { vergte "${kversion}" "3.15"; } && { verlt "${kversion}" "4.4"; } ) ||
+ ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ); then
+ # While the original motivation of this patch is for fixing builds using
+ # clang, the same error occurs between linux >= 3.15 and < 4.4, and in
+ # 4.15, 4.16.
+ #
+ # This patch only partially applies due to changes in kernel/Makefile,
+ # so a supplementary patch is needed
+ #
+ # Without this patch, builds fail with
+ # Cannot find symbol for section 2: .text.
+ # kernel/elfcore.o: failed
+ #
+ # @see https://github.com/linuxppc/issues/issues/388
+ # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
+ #
+ patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
+ if grep -q elfcore.o kernel/Makefile ; then
+ sed -i '/^.* += elfcore.o$/d' kernel/Makefile
+ fi
+ fi
+
+ # 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
+
+ # 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
+
+ if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
+ { vergte "${pahole_version}" "1.24"; } &&
+ { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
+ # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
+ # fail with the following error:
+ # BTFIDS vmlinux
+ # FAILED: load BTF from vmlinux: Invalid argument
+ #
+ # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
+ # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
+ # BTF_KIND_ENUM64.
+ #
+ # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
+ # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
+ #
+ if [ -f "scripts/pahole-flags.sh" ] ; then
+ sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
+ else
+ sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
+ fi
+ fi
+
+ # GCC 4.8
+ if [ "$HOSTCC" == "gcc-4.8" ]; then
+ scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
+ scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
+ fi
+
+ # Don't try to sign modules
+ scripts/config --disable CONFIG_MODULE_SIG
+
+ # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
+ scripts/config --disable CONFIG_STACK_VALIDATION
+
+ # Cause problems with inline assembly on i386
+ scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
+
+ # Don't build samples, they are broken on some kernel releases
+ scripts/config --disable CONFIG_SAMPLES
+ scripts/config --disable CONFIG_BUILD_DOCSRC
+
+ # Disable kcov
+ scripts/config --disable CONFIG_KCOV
+
+ # Broken on some RT kernels
+ scripts/config --disable CONFIG_HYPERV
+
+ # Broken drivers
+ scripts/config --disable CONFIG_RAPIDIO_TSI721
+ scripts/config --disable CONFIG_SGI_XP
+ scripts/config --disable CONFIG_MFD_WM8994
+ scripts/config --disable CONFIG_DRM_RADEON
+ scripts/config --disable CONFIG_SND_SOC_WM5100
+ # More recent compiler optimizations (from gcc 8 onwards )expose build errors
+ # with netronome on older kernels.
+ # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
+ # It seems easier to disable the driver than to attempt patching.
+ # Eg.
+ # In function ‘ur_load_imm_any’,
+ # inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
+ # ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
+ # 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
+ #
+ scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
+ # Eg.
+ # In function ‘memcpy’,
+ # inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
+ # ./include/linux/string.h:305:25: error: call to ‘__read_overflow2’ declared with attribute error: detected read beyond size of object passed as 2nd parameter
+ # 305 | __read_overflow2();
+ # | ^~~~~~~~~~~~~~~~~~
+ # make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
+ #
+ scripts/config --disable CONFIG_MICREL_PHY
+
+
+ # IGBVF won't build with recent gcc on 2.6.38.x
+ if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
+ scripts/config --disable CONFIG_IGBVF
+ fi
+
+ # Don't fail the build on warnings
+ scripts/config --disable CONFIG_WERROR
+ scripts/config --enable CONFIG_PPC_DISABLE_WERROR
+
+ # Set required options
+ scripts/config --enable CONFIG_TRACEPOINTS
+ scripts/config --enable CONFIG_KALLSYMS
+ scripts/config --enable CONFIG_HIGH_RES_TIMERS
+ scripts/config --enable CONFIG_KPROBES
+ scripts/config --enable CONFIG_FTRACE
+ scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
+ scripts/config --enable CONFIG_KALLSYMS_ALL
+ scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
+ scripts/config --enable CONFIG_PERF_EVENTS
+ scripts/config --enable CONFIG_EVENT_TRACING
+ scripts/config --enable CONFIG_KRETPROBES
+
+ if [ -n "${DEBUG}" ] ; then
+ cat .config
+ fi
+
+ make "$update_conf_target" "${make_args[@]}"
+ make -j"$NPROC" "${make_args[@]}"
+
+ krelease=$(make -s kernelrelease "${make_args[@]}")
+
+ # Save the kernel and modules
+ mkdir -p "$LINUX_INSTOBJ_DIR/boot"
+ make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
+ make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
+ rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
+ ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
+ ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
+}
+
+
+extract_distro_headers() {
+
+ # Enter linux source dir
+ cd "${LINUX_SRCOBJ_DIR}"
+
+
+ # For RT kernels, copy version file
+ if [ -s localversion-rt ]; then
+ cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
+ fi
+
+ # Copy all Makefile related stuff
+ find . -path './include/*' -prune \
+ -o -path './scripts/*' -prune -o -type f \
+ \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
+ -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
+ -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
+
+ # Copy base scripts and include dirs
+ cp -a scripts include "${LINUX_HDROBJ_DIR}"
+
+ # Copy arch includes
+ (find arch -name include -type d -print0 | \
+ xargs -0 -n1 -i: find : -type f) | \
+ cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
+
+ # Copy arch scripts
+ (find arch -name scripts -type d -print0 | \
+ xargs -0 -n1 -i: find : -type f) | \
+ cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
+
+ # Cleanup scripts
+ rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
+ rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
+
+ # On powerpc 32bits this object is required to link modules
+ if [ "${karch}" = "powerpc" ]; then
+ if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
+ :
+ else
+ cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
+ fi
+ fi
+
+ # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
+ if [ "${karch}" = "arm64" ]; then
+ if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
+ cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
+ fi
+ fi
+
+ # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
+ if [ -f tools/objtool/objtool ]; then
+ cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
+ fi
+
+ if [ -f "arch/x86/kernel/macros.s" ]; then
+ cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
+ fi
+
+ # Copy modules related stuff, if available
+ if [ -s Module.symvers ]; then
+ cp Module.symvers "${LINUX_HDROBJ_DIR}"
+ fi
+
+ if [ -s System.map ]; then
+ cp System.map "${LINUX_HDROBJ_DIR}"
+ fi
+
+ if [ -s Module.markers ]; then
+ cp Module.markers "${LINUX_HDROBJ_DIR}"
+ fi
+
+ # Copy config file
+ cp .config "${LINUX_HDROBJ_DIR}"
+
+ # Make sure the Makefile and version.h have a matching timestamp so that
+ # external modules can be built
+ if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
+ touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
+ elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
+ touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
+ else
+ echo "Missing version.h"
+ exit 1
+ fi
+ touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
+
+ # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
+ if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
+ cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
+ fi
+
+ # Finally clean the object files from the full source tree
+ make clean
+
+ # And regen the modules support files
+ make modules_prepare "${make_args[@]}"
+
+ # On powerpc 32bits this object is required to link modules
+ if [ "${karch}" = "powerpc" ]; then
+ if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
+ :
+ else
+ make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
+ fi
+ fi
+
+ # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
+ if [ "${karch}" = "arm64" ]; then
+ if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
+ make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
+ fi
+ fi
+
+ # Version specific tasks
+ case "$ktag" in
+ Ubuntu*)
+ # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
+ ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
+ echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
+ echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
+ ;;
+ esac
+}
+
+
+build_modules() {
+
+ local kdir="$1"
+ local outdir="$2"
+ local kversion
+
+ kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
+
+ # Try to catch some compatibility problems by turning some
+ # warnings into errors.
+ #export KCFLAGS="$KCFLAGS -Wall -Werror"
+
+ # Enter lttng-modules source dir
+ cd "${MODULES_GIT_DIR}"
+
+ # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
+ # timekeeping subsystem. We want those build to fail.
+ if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
+ { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
+
+ set +e
+
+ # Build modules
+ KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
+ ret=$?
+
+ set -e
+
+ # We expect this build to fail, if it doesn't, fail the job.
+ if [ "$ret" -eq 0 ]; then
+ echo "This build should have failed."
+ exit 1
+ fi
+
+ # We have to publish at least one file or the build will fail
+ echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
+
+ KERNELDIR="${kdir}" make clean
+
+ else # Regular build
+
+ # Build modules against full kernel sources
+ KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
+
+ # Install modules to build dir
+ KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
+
+ # Clean build dir
+ KERNELDIR="${kdir}" make clean
+ fi
+}
+
+
+## MAIN ##
+
+# Use all CPU cores
+NPROC=$(nproc)
+
+MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
+LINUX_GIT_DIR="${WORKSPACE}/src/linux"
+
+LINUX_OBJ_DIR="${WORKSPACE}/linux"
+LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
+LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
+LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
+
+MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
+MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
+
+LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
+
+OBJ_STORE_URL="s3://jenkins"
+
+cd "$WORKSPACE"
+
+# Create build directories
+mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
+
+git_clone_modules_sources
+
+# Setup cross compile env if available
+if [ "x${cross_arch}" != "x" ]; then
+
+ case "$cross_arch" in
+ "armhf")
+ karch="arm"
+ cross_compile="arm-linux-gnueabihf-"
+ vanilla_config="imx_v6_v7_defconfig"
+ ubuntu_config="armhf-config.flavour.generic"
+ ;;
+
+ "arm64")
+ karch="arm64"
+ cross_compile="aarch64-linux-gnu-"
+ vanilla_config="defconfig"
+ ubuntu_config="arm64-config.flavour.generic"
+ ;;
+
+ "powerpc")
+ karch="powerpc"
+ cross_compile="powerpc-linux-gnu-"
+ vanilla_config="ppc44x_defconfig"
+ ubuntu_config="powerpc-config.flavour.powerpc-smp"
+ ;;
+
+ "ppc64el")
+ karch="powerpc"
+ cross_compile="powerpc64le-linux-gnu-"
+ vanilla_config="pseries_le_defconfig"
+ ubuntu_config="ppc64el-config.flavour.generic"
+ ;;
+
+ *)
+ echo "Unsupported cross arch $cross_arch"
+ exit 1
+ ;;
+ esac
+
+ # Export variables used by Kbuild for cross compilation
+ export ARCH="${karch}"
+ export CROSS_COMPILE="${cross_compile}"
+
+# Set arch specific values if we are not cross compiling
+elif [ "x${arch}" != "x" ]; then
+
+ case "$arch" in
+ "i386")
+ karch="x86"
+ vanilla_config="allmodconfig"
+ ubuntu_config="i386-config.flavour.generic"
+ ;;
+
+ "amd64")
+ karch="x86"
+ vanilla_config="allmodconfig"
+ ubuntu_config="amd64-config.flavour.generic"
+ ;;
+
+ "armhf")
+ karch="arm"
+ vanilla_config="allmodconfig"
+ ubuntu_config="armhf-config.flavour.generic"
+ ;;
+
+ "arm64")
+ karch="arm64"
+ vanilla_config="allmodconfig"
+ ubuntu_config="arm64-config.flavour.generic"
+ ;;
+
+ "powerpc")
+ karch="powerpc"
+ vanilla_config="allmodconfig"
+ ubuntu_config="powerpc-config.flavour.powerpc-smp"
+ ;;
+
+ "ppc64el")
+ karch="powerpc"
+ vanilla_config="allmodconfig"
+ ubuntu_config="ppc64el-config.flavour.generic"
+ ;;
+
+ *)
+ echo "Unsupported arch $arch"
+ exit 1
+ ;;
+ esac
+else
+ echo "No arch or cross_arch specified"
+ exit 1
+fi
+
+
+
+# First get the kernel build from the object store, or build it, if it's
+# not available.
+
+echo "# Setup endpoint
+host_base = obj.internal.efficios.com
+host_bucket = obj.internal.efficios.com
+bucket_location = us-east-1
+use_https = True
+
+# Setup access keys
+access_key = jenkins
+secret_key = echo123456
+
+# Enable S3 v4 signature APIs
+signature_v2 = False" > "$WORKSPACE/.s3cfg"
+
+url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
+obj_name="linux.tar.bz2"
+
+if [ "x${cross_arch}" = "x" ]; then
+ obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
+else
+ obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
+fi
+
+obj_url="$obj_url_prefix/$obj_name"
+
+set +e
+# In s3cmd 2.3, the return code of get when an object does not exist (64)
+# is different than in 2.2 (12). The return codes of 's3cmd info' are
+# consistent between 2.2 and 2.3.
+s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
+ret=$?
+set -e
+
+case "$ret" in
+ "0")
+ s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
+ extract_archive_obj
+ ;;
+
+ "12")
+ echo "File not found"
+
+ # Build all the things and upload
+ # then finish the module build...
+
+ git_clone_linux_sources
+ git_export_linux_sources
+
+ select_compiler
+
+ ## PREPARE FULL LINUX SOURCE TREE
+ build_linux_kernel
+
+ ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
+ extract_distro_headers
+
+ tar_archive_obj
+
+ upload_archive_obj
+
+ ;;
+
+ *)
+ echo "Unknown error? Abort"
+ exit 1
+ ;;
+esac
+
+select_compiler
+
+selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
+# lttng-modules requires gcc >= 5.1 for aarch64
+# @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
+if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
+ echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
+ exit 0
+fi
+
+## BUILD modules
+# Either we downloaded a pre-build kernel or we built it and uploaded
+# the archive for future builds.
+
+cd "$WORKSPACE"
+
+# Build modules against full kernel sources
+build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
+
+# Build modules against kernel headers
+build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
+
+# Make sure some modules were actually built
+tree "${MODULES_OUTPUT_KSRC_DIR}"
+if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
+ echo "No modules built!"
+ exit 1
+fi