CONFIG_PPC_STD_MMU is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_PPC_STD_MMU (not configurable)

modulename: hashtable.ko

configname: CONFIG_PPC_STD_MMU

Linux/PowerPC Kernel Configuration
└─>Processor
└─>PPC_STD_MMU
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
arch/ppc/mm/
depends
CONFIG_6xx