Errors when building kernel

[RL]

This is my fist time building a kernel. I CVSUP'ed to the latest
source (on RELENG_5_3) on my FDBSD 5.3 system. I edited some things in
the config file and I did a make buildkernel KERNCONF=MYKERNEL.  It
compiles for a while, but errors; I get this (a snippet):

: undefined reference to `xpt_done'
entry.o(.text+0x2758): In function `hpt_action':
: undefined reference to `xpt_done'
entry.o(.text+0x27b6): In function `hpt_action':
: undefined reference to `xpt_done'
entry.o(.text+0x27cd): In function `hpt_action':
: undefined reference to `xpt_done'
entry.o(.text+0x27e2): more undefined references to `xpt_done' follow
fdc.o(.text+0xb5d): In function `fdc_worker':
: undefined reference to `isa_dmadone'
fdc.o(.text+0x1385): In function `fdc_worker':
: undefined reference to `isa_dmastart'
fdc.o(.text+0x1613): In function `fdc_worker':
: undefined reference to `isa_dmadone'
fdc.o(.text+0x22dc): In function `fdc_detach':
: undefined reference to `isa_dma_release'
fdc.o(.text+0x243a): In function `fdc_attach':
: undefined reference to `isa_dma_acquire'
fdc.o(.text+0x2454): In function `fdc_attach':
: undefined reference to `isa_dmainit'
fdc_acpi.o(.text+0x179): In function `fdc_acpi_attach':
: undefined reference to `fdc_isa_alloc_resources'
ppc.o(.text+0xe7f): In function `ppcintr':
: undefined reference to `isa_dmadone'
ppc.o(.text+0x1020): In function `ppc_write':
: undefined reference to `isa_dmastart'
ppc.o(.text+0x1064): In function `ppc_write':
: undefined reference to `isa_dmadone'
ppc.o(.text+0x15c0): In function `ppc_attach':
: undefined reference to `isa_dma_acquire'
ppc.o(.text+0x15cd): In function `ppc_attach':
: undefined reference to `isa_dmainit'
sio.o(.text+0x502): In function `sioprobe':
: undefined reference to `isa_irq_pending'
sio.o(.text+0x6b4): In function `sioprobe':
: undefined reference to `isa_irq_pending'
sio.o(.text+0x6d8): In function `sioprobe':
: undefined reference to `isa_irq_pending'
sio.o(.text+0x712): In function `sioprobe':
: undefined reference to `isa_irq_pending'
*** Error code 1

Stop in /usr/obj/usr/src/sys/MYKERNEL.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
 ---------------------------------------------

So what's amatter??