openwrt ixp4xx trunk build error

  AS      arch/arm/mm/proc-xscale.o
/tmp/ccB60cIh.s: Assembler messages:
/tmp/ccB60cIh.s: Error: .size expression for xscsale_dma_a0_map_area does not evaluate to a constant
make[6]: *** [arch/arm/mm/proc-xscale.o] Error 1
make[5]: *** [arch/arm/mm] Error 2
make[5]: Leaving directory `/data/users/damocles/devel/openwrt/trunk/build_dir/linux-ixp4xx_generic/linux-2.6.37.6'
make[4]: *** [/data/users/damocles/devel/openwrt/trunk/build_dir/linux-ixp4xx_generic/linux-2.6.37.6/.image] Error 2
make[4]: Leaving directory `/data/users/damocles/devel/openwrt/trunk/target/linux/ixp4xx'
make[3]: *** [install] Error 2
make[3]: Leaving directory `/data/users/damocles/devel/openwrt/trunk/target/linux'
make[2]: *** [target/linux/install] Error 2
make[2]: Leaving directory `/data/users/damocles/devel/openwrt/trunk'
make[1]: *** [/data/users/damocles/devel/openwrt/trunk/staging_dir/target-armeb_v5te_uClibc-0.9.33/stamp/.target_install] Error 2
make[1]: Leaving directory `/data/users/damocles/devel/openwrt/trunk'
make: *** [world] Error 2