CONFIG_IDE_XFER_MODE (not configurable)

configname: CONFIG_IDE_XFER_MODE

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support
└─>IDE_XFER_MODE
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
depends
CONFIG_IDE