default or selected kernelversion does not have config value CONFIG_ALTERNATE_USER_ADDRESS_SPACE.
Result is shown for kernelversion 6.9.9
CONFIG_ALTERNATE_USER_ADDRESS_SPACE (not configurable)
configname: CONFIG_ALTERNATE_USER_ADDRESS_SPACE
Linux Kernel Configuration
└─>General architecture-dependent options
└─>ALTERNATE_USER_ADDRESS_SPACE
In linux kernel since version 5.2 (release Date: 2019-07-07)
Architectures set this when the CPU uses separate address
spaces for kernel and user space pointers. In this case, the
access_ok() check on a __user pointer is skipped.
spaces for kernel and user space pointers. In this case, the
access_ok() check on a __user pointer is skipped.