Packages with the kmod use flag

sys-apps / pciutils : Various utilities dealing with the PCI bus

Enable sys-apps/kmod support for the -k switch in lspci command

sys-apps / systemd : System and service manager for Linux

Enable kernel module loading via sys-apps/kmod

sys-fs / eudev : Linux dynamic and persistent device naming support (aka userspace devfs)

enable module loading through libkmod

sys-fs / udev : Linux dynamic and persistent device naming support (aka userspace devfs)

Enable kernel module loading/unloading support using sys-apps/kmod

sys-kernel / kpatch : Dynamic kernel patching for Linux

Enable a kernel module (.ko file) which provides an interface for the patch modules to register new functions for replacement.