In Arch Linux
mkinitcpio -p linux
shows
Possibly missing firmware for module: aic94xx
Possibly missing firmware for module: wd719x
git clone https://aur.archlinux.org/aic94xx-firmware.git
cd aic94xx-firmware
makepkg -sri
git clone https://aur.archlinux.org/wd719x-firmware.git
cd wd719x-firmware
makepkg -sri
and then mkinitcpio -p linux
again.
You answered yourself (some of us did too above).
Feel free to ask Kernel developers for more information.
Here are some useful links:
https://www.kernel.org/category/contact-us.html
https://kernelnewbies.org/