This is a mixin layer to add a backport of Linux 5.10 to Xilinx Petalinux 2020.2 based Yocto projects. It uses the xlnx_rebase_v5.10_2021.1 branch of linux-xlnx.
To switch between kernel versions, use PREFERRED_VERSION (e.g. in local.conf):
# Use 5.4
PREFERRED_VERSION_linux-xlnx = "5.4+%"
# Use 5.10
PREFERRED_VERSION_linux-xlnx = "5.10+%"