I'm trying to upgrade kernel from 4.14 to 4.18-rc3 (yes, I know 4.18 was released, but I am using a manufacturer-specific branch (linux-sunxi)). Get boot error (edited for brevity):
Gave up waiting for root device. ALERT! /dev/mmcblk0p2 does not exist. Dropping to a shell!
When I boot 4.14, /dev/mmcblk0p2 is mounted on /. It holds the fs. FWIW, mmcblk0p2 is not mentioned in /etc/fstab.
What can I try?