Updating Kernel in Gentoo

Reference Gentoo wiki Kernel/Upgrade - https://wiki.gentoo.org/wiki/Kernel/Upgrade

Set symlink

sudo eselect kernel list

sudo eselect kernel set x

Copy .config to new source

sudo cp /usr/src/linux-{current_kernel_version}-gentoo/.config /usr/src/linux/

Update .config

sudo makeolddefconfig

At build step use genkernel

sudo genkernel --virtio all

Update grub config

sudo grub-mkconfig -o /boot/grub/grub.cfg

Reboot and check new kernel functions before removing old kernel sources