Possibly missing firmware

Possibly missing firmware for module XXXX When initramfs are being rebuild after a kernel update, you might get these or similar warnings:

==> WARNING: Possibly missing firmware for module: wd719x
==> WARNING: Possibly missing firmware for module: aic94xx
==> WARNING: Possibly missing firmware for module: xhci_pci

These appear to most Arch Linux users, as the firmware is not included in the linux-firmware package. If you do not use hardware which uses these firmwares you can safely ignore this message. Currently, the only solution for suppressing warnings for wd719x and aic94xx modules is actually installing firmware packages for them.

For aic94xx, install aic94xx-firmware AUR.
For wd719x, install wd719x-firmware AUR.
For xhci_pci, install upd72020x-fw AUR.

See related discussion here.

Most common firmware files can be acquired by installing the linux-firmware package. For other packages providing firmware, try searching for the module name in the official repositories or AUR.