CONFIG_DUMP_CODE is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Show disassembly of nearby code in register dumps

modulename: disassemble.ko

configname: CONFIG_DUMP_CODE

Linux Kernel Configuration
└─>Show disassembly of nearby code in register dumps
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
This prints out a code trace of the instructions leading up to
the faulting instruction as a debugging aid. As this does grow
the kernel in size a bit, most users will want to say N here.

Those looking for more verbose debugging output should say Y.

source code: