virtualbox-modules-1.5.2 перестали собираться

Доброго времени суток.
Обновил ядро.

lrwxrwxrwx 1 root root 22 Дек 6 00:18 linux -> linux-2.6.23-gentoo-r3
drwxr-xr-x 20 root root 4096 Дек 6 19:03 linux-2.6.23-gentoo-r3

все нормально работает, но ни в какую не хотят обновляться сабж :(

* Messages for package app-emulation/virtualbox-modules-1.5.2-r1:

*
* ERROR: app-emulation/virtualbox-modules-1.5.2-r1 failed.
* Call stack:
* ebuild.sh, line 1701: Called dyn_compile
* ebuild.sh, line 1039: Called qa_call 'src_compile'
* ebuild.sh, line 44: Called src_compile
* ebuild.sh, line 1383: Called linux-mod_src_compile
* linux-mod.eclass, line 518: Called die
* The specific snippet of code:
* emake HOSTCC="$(tc-getBUILD_CC)" CC="$(get-KERNEL_CC)" LDFLAGS="$(get_abi_LDFLAGS)" \
* ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS} \
* || die "Unable to make ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS}."
* The die message:
* Unable to make KERN_DIR=/usr/src/linux KERNOUT=/usr/src/linux all.
*
* If you need support, post the topmost build error, and the call stack if relevant.
* A complete build log is located at '/var/tmp/portage/app-emulation/virtualbox-modules-1.5.2-r1/temp/build.log'.
*

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вообще ошибка выше началась

In file included from /var/tmp/portage/app-emulation/virtualbox-modules-1.5.2-r1/work/vboxdrv/SUPDRV.h:28,
from /var/tmp/portage/app-emulation/virtualbox-modules-1.5.2-r1/work/vboxdrv/SUPDRVShared.c:22:
/var/tmp/portage/app-emulation/virtualbox-modules-1.5.2-r1/work/vboxdrv/include/iprt/asm.h:125: ошибка: expected specifier-qualifier-list before ‘linux_uintptr_t’
/var/tmp/portage/app-emulation/virtualbox-modules-1.5.2-r1/work/vboxdrv/include/iprt/asm.h:136: ошибка: expected specifier-qualifier-list before ‘linux_uintptr_t’
------------

кто сталкивался? обычно все хорошо собиралось. может я забыл чего?