Oh, excellent; thank you. I mentioned it because this has bitten me, so I'll want to use that fix.
Fun story: for $REASONS, I have an Arch system with root on btrfs and /boot on ext4, and it doesn't usually have the boot partition mounted (it's a poorly done mutiboot issue). I recently discovered that this means if I forget to mount boot before updating I get stuck with no loaded drivers to mount /boot :) Thankfully kexec worked, but I'd like to not need to do that:)