Ion CMA heap support

modulename: ion_cma_heap.ko


Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Ion Memory Manager
└─>Ion CMA heap support
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Choose this option to enable CMA heaps with Ion. This heap is backed
by the Contiguous Memory Allocator (CMA). If your system has these
regions, you should say Y here.

source code: