reproduce (this is a W=1 build): git clone https://github.com/intel/lkp-tests.git ~/lkp-tests # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu git remote add net https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git git fetch net main git checkout net/main b4 shazam https://lore.kernel.org/r/20240506120400.712629-1-horatiu.vultur@microchip.com # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash net/ipv4/