Cannot mount UBIFS volume rootfs to RO

[JH <jupiter.hce@xxxxxxxxx>]

Hi,

I passed the root=ubi0:rootfs-volume ro ubi.mtd=2,2048 noinitrd
rootfstype=ubifs mem=256M rootwait=1 to kernel command line, but the
rootfs was still mounted as rw, can UBIFS volume rootfs support ro? Or
what could be missing here?

root# mount
ubi0:rootfs-volume on / type ubifs (rw,relatime,assert=read-only,ubi=0,vol=2)

Thank you.

Kind regards,

- jh

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