gistfile1.txt

sh-3.2# cat ./systemd/system/local-fs.target.wants/system.mount 
[Unit]
Description=Droid mount for /system
Before=local-fs.target systemd-modules-load.service

[Mount]
What=/dev/mmcblk0p37
Where=/system
Type=ext4
Options=ro,remount
# Options had SELinux context option:  

# Default is 90 which makes mount period too long in case of
# errors so drop it down a notch.
TimeoutSec=10

[Install]
WantedBy=local-fs.target

# From ./out/target/product/xt897/root/init.target.rc :
#     mount ext4 /dev/mmcblk0p37 /system ro remount