I too just installed a new kernel (6.6.13). My notes told me to do :
make && make firmware_install && make modules_install
mount /boot
cp arch/x86_64/boot/bzImage /boot/vmlinuz-<nn>-gentoo-r<n>
cp System.map /boot/System.map-<nn>-gentoo-r<n>
which worked with the appropriate version numbers inserted,
but not before it choked on 'make firmware_install', which has disappeared.
I too use Lilo, a simple + reliable boot manager.
I have long wondered why the compile stage takes so long :
it compiles innumerable .o files,
which seem to involve config options I haven't chosen.
The new kernel image is size 17633728 via 'ls -l /boot' : is that correct ?
It does indeed boot & there are no changes in behaviour.
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