Problem with framebuffer from nioswiki

Hello,

i try to build a custum linux kernel with framebuffer from nioswiki. I build a nios 2 system with sopc builder with nios2,jtag uart,timer,sdram and vga controller for the terasic de1 board. The vga controller works in nios2 ide with the sample c code from nioswiki. The default uclinux kernel works also with this system.

When i try to enable the framebuffer in kernel config i get this error :

drivers/built-in.o(.text+0xfa0): In function `fb_mmap':

drivers/video/fbmem.c:1219: undefined reference to `io_remap_pfn_range'

make[1]: *** [vmlinux] Fehler 1

make: *** [linux] Fehler 1