Hi,
I can not find linux-headers-4.9.140-tegra-ubuntu18.04_aarch64 directory, How to generate linux-headers-4.9.140-tegra-ubuntu18.04_aarch64 directory.
~$ ls /usr/src/
linux-headers-4.9.201-tegra-ubuntu18.04_aarch64 nvidia
~$ uname -a
Linux desktop 4.9.140-tegra #1 SMP PREEMPT Fri Apr 30 16:08:44 CST 2021 aarch64 aarch64 aarch64 GNU/Linux