CC [M]  net/ipsec/ipcomp.o
  LD [M]  net/ipsec/ipsec.o
  Building modules, stage 2.
  MODPOST 1947 modules
WARNING: vmlinux(.text+0xc010116f): Section mismatch: reference to .init.text:start_kernel (between 'is386' and 'check_x87')
WARNING: vmlinux(.text+0xc02f9978): Section mismatch: reference to .init.text: (between 'rest_init' and 'alloc_node_mem_map')
WARNING: vmlinux(.text+0xc02ff4f0): Section mismatch: reference to .init.text: (between 'iret_exc' and '_etext')
WARNING: vmlinux(.text+0xc02ff4fc): Section mismatch: reference to .init.text: (between 'iret_exc' and '_etext')
WARNING: vmlinux(.text+0xc02ff508): Section mismatch: reference to .init.text: (between 'iret_exc' and '_etext')
WARNING: vmlinux(.text+0xc02ff514): Section mismatch: reference to .init.text: (between 'iret_exc' and '_etext')
WARNING: vmlinux(.text+0xc02f9a40): Section mismatch: reference to .init.text:__alloc_bootmem_node (between 'alloc_node_mem_map' and 'zone_wait_table_init')
WARNING: vmlinux(.text+0xc02f9ace): Section mismatch: reference to .init.text:__alloc_bootmem_node (between 'zone_wait_table_init' and '__sched_text_start')
WARNING: vmlinux(.text+0xc02ffc82): Section mismatch: reference to .init.text: (between 'iret_exc' and '_etext')
WARNING: drivers/video/vesafb.o(.exit.text+0x5d): Section mismatch: reference to .init.data:vesafb_fix (after 'vesafb_remove')
WARNING: drivers/video/vesafb.o(.exit.text+0x65): Section mismatch: reference to .init.data:vesafb_fix (after 'vesafb_remove')
ERROR: "udp4_unregister_esp_rcvencap" [net/ipsec/ipsec.ko] undefined!
ERROR: "udp4_register_esp_rcvencap" [net/ipsec/ipsec.ko] undefined!
make[2]: *** [__modpost] Error 1
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/usr/src/linux-source-2.6.22'
make: *** [debian/stamp-build-kernel] Error 2