Ion Memory Manager

modulename: ion.ko
configname: CONFIG_ION

Linux Kernel Configuration
└─> Device Drivers
└─> Staging drivers
└─> Android
└─> Ion Memory Manager

Choose this option to enable the ION Memory Manager,
used by Android to efficiently allocate buffers
from userspace that can be shared between drivers.
If you're not using Android its probably safe to
say N here.

source code: