default or selected kernelversion does not have config value CONFIG_HAVE_FAST_GUP.
Result is shown for kernelversion 6.9.9

CONFIG_HAVE_FAST_GUP (not configurable)

configname: CONFIG_HAVE_FAST_GUP

Linux Kernel Configuration
└─>Memory Management options
└─>HAVE_FAST_GUP
In linux kernel since version 5.1 (release Date: 2019-05-05)  
depends
CONFIG_MMU