reproduce (this is a W=1 build): git remote add rust https://github.com/Rust-for-Linux/linux git fetch rust rust-next git checkout rust/rust-next b4 shazam https://lore.kernel.org/r/20250617140032.1133337-2-guillaume1.gomez@gmail.com # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash rustfmtcheck