CONFIG_BLK_RQ_ALLOC_TIME (not configurable)

configname: CONFIG_BLK_RQ_ALLOC_TIME

Linux Kernel Configuration
└─>Enable the block layer
└─>BLK_RQ_ALLOC_TIME
In linux kernel since version 5.1 (release Date: 2019-05-05)  
depends
CONFIG_BLOCK

is depended by
CONFIG_BLK_CGROUP_IOCOST