reproduce (this is a W=1 build): git remote add herbert-crypto-2.6 https://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git git fetch herbert-crypto-2.6 master git checkout herbert-crypto-2.6/master b4 shazam https://lore.kernel.org/r/20231025065700.1556152-3-JESHWANTHKUMAR.NK@amd.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 drivers/crypto/ccp/