CONFIG_CPU_XSCALE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_XSCALE (not configurable)

modulename: copypage-xscale.ko

and/or

proc-xscale.ko

configname: CONFIG_CPU_XSCALE

Linux Kernel Configuration
└─>CPU_XSCALE
In linux kernel since version 2.6.12  
source code:
arch/arm/mm/copypage-xscale.c


is depended by
CONFIG_ARCH_PXA