default or selected kernelversion does not have config value CONFIG_ION_CMA_HEAP.
Result is shown for kernelversion 6.9.9
Ion CMA heap support
modulename: ion_cma_heap.ko
configname: CONFIG_ION_CMA_HEAP
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Android
└─>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.
by the Contiguous Memory Allocator (CMA). If your system has these
regions, you should say Y here.