Something

make[1]: Entering directory `/usr/src/voicebus'
make -C /lib/modules/2.6.22.13-0.1.smp.gcc3.4.x86.i686/build SUBDIRS=/usr/src/voicebus/kernel HOTPLUG_FIRMWARE=yes KBUILD_OBJ_M="pciradio.o tor2.o torisa.o wcfxo.o wct1xxp.o wctdm.o wcte11xp.o wcusb.o zaptel.o ztd-eth.o ztd-loc.o ztdummy.o ztdynamic.o zttranscode.o wct4xxp/ wctc4xxp/ xpp/ wctdm24xxp/ wcte12xp/" modules
make[2]: Entering directory `/lib/modules/2.6.22.13-0.1.smp.gcc3.4.x86.i686/build'
  CC [M]  /usr/src/voicebus/kernel/wctdm24xxp/../voicebus.o
/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.c: In function `vb_isr':
/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.c:112: sorry, unimplemented: inlining failed in call to 'vb_deferred': function body not available
/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.c:1107: sorry, unimplemented: called from here
/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.c:112: sorry, unimplemented: inlining failed in call to 'vb_deferred': function body not available
/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.c:1131: sorry, unimplemented: called from here
make[4]: *** [/usr/src/voicebus/kernel/wctdm24xxp/../voicebus.o] Error 1
make[3]: *** [/usr/src/voicebus/kernel/wctdm24xxp] Error 2
make[2]: *** [_module_/usr/src/voicebus/kernel] Error 2
make[2]: Leaving directory `/lib/modules/2.6.22.13-0.1.smp.gcc3.4.x86.i686/build'
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/usr/src/voicebus'
make: *** [all] Error 2