CONFIG_PPC_BESTCOMM_GEN_BD is not available for the selected architecture x86.
Result is shown for architecture powerpc
Bestcomm GenBD tasks support
modulename: bestcomm-gen-bd.ko
configname: CONFIG_PPC_BESTCOMM_GEN_BD
Linux Kernel Configuration
└─>Bestcomm GenBD tasks support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
This option enables the support for the GenBD tasks.