CONFIG_X86_32 (not configurable)

modulename: sys_ia32.ko

and/or

tls.ko

and/or

amd.ko

and/or

doublefault_32.ko

and/or

pgtable_32.ko

configname: CONFIG_X86_32

Linux Kernel Configuration
└─>X86_32
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
arch/x86/kernel/sys_ia32.c

depends
NOT CONFIG_64BIT