CONFIG_BLK_CGROUP_RWSTAT (not configurable)

modulename: blk-cgroup-rwstat.ko

configname: CONFIG_BLK_CGROUP_RWSTAT

Linux Kernel Configuration
└─>Enable the block layer
└─>BLK_CGROUP_RWSTAT
In linux kernel since version 5.1 (release Date: 2019-05-05)  
source code:
block/blk-cgroup-rwstat.c
depends
CONFIG_BLOCK