CONFIG_GENERIC_PCI_IOMAP (not configurable)

modulename: pci_iomap.ko

and/or

ioport.ko

configname: CONFIG_GENERIC_PCI_IOMAP

Linux Kernel Configuration
└─>Library routines
└─>GENERIC_PCI_IOMAP
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
lib/pci_iomap.c
is selected by
CONFIG_VIA_RHINE