CONFIG_GENERIC_CSUM is not available for the selected architecture x86.
Result is shown for architecture microblaze

CONFIG_GENERIC_CSUM (not configurable)

modulename: checksum.ko

configname: CONFIG_GENERIC_CSUM

Linux Kernel Configuration
└─>GENERIC_CSUM
In linux kernel since version 2.6.31 (release Date: 2009-09-09)