Effected: sys-kernel/gentoo-sources version linux-5.1.14-gentoo, linux-4.14.83-gentoo, etc. with sys-kernel/genkernel-next-70 Behavior: genkernel-next disables CONFIG_NVME_CORE by default; tested -69 and -70 versions. The related bug 624854 for genkernel was fixed, so it looks like an oversight.