[yocto] devtmpfs failing to mount

[Emily S]

Hi all -

I'm using Yocto version rocko with a custom layer to run on the Zynq+ SoC
on a custom board. When trying to boot I'm getting the following error in
the boot output:
[    4.205861] devtmpfs: error mounting -2

dmesg | tail shows a similar result:

[    4.127997] EXT4-fs (mmcblk0p2): couldn't mount as ext3 due to feature
incompatibilities
[    4.183737] EXT4-fs (mmcblk0p2): recovery complete
[    4.190840] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data
mode. Opts: (null)
[    4.198870] VFS: Mounted root (ext4 filesystem) on device 179:2.
[    4.205861] devtmpfs: error mounting -2

Are there common reasons for this happening I should check? I'm having
trouble isolating a cause. The only change I made was including an
additional python library in one of my recipes, which I will try rolling
back next.
Any ideas are greatly appreciated!

Thanks,
Emily
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