Command line partition support

modulename: cmdline.ko

configname: CONFIG_CMDLINE_PARTITION

Linux Kernel Configuration
└─>Enable the block layer
└─>Partition Types
└─>Command line partition support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y here if you want to read the partition table from bootargs.
The format for the command line is just like mtdparts.

source code: