In file included from /usr/src/linux/include/linux/sched.h:57,
                 from /usr/src/linux/include/linux/module.h:9,
                 from /var/tmp/portage/alsa-driver-1.0.11/work/alsa-driver-1.0.11/include/adriver.h:45,
                 from sgbuf.c:13:
/usr/src/linux/include/asm/semaphore.h: In function 'down':
/usr/src/linux/include/asm/semaphore.h:105: error: expected ':' or ')' before 'sgbuf'
/usr/src/linux/include/asm/semaphore.h: In function 'down_interruptible':
/usr/src/linux/include/asm/semaphore.h:130: error: expected ':' or ')' before 'sgbuf'
/usr/src/linux/include/asm/semaphore.h: In function 'down_trylock':
/usr/src/linux/include/asm/semaphore.h:155: error: expected ':' or ')' before 'sgbuf'
/usr/src/linux/include/asm/semaphore.h: In function 'up':
/usr/src/linux/include/asm/semaphore.h:179: error: expected ':' or ')' before 'sgbuf'
make[1]: *** [sgbuf.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [hwdep.o] Error 1
make[1]: *** [memalloc.o] Error 1
make[1]: Leaving directory `/var/tmp/portage/alsa-driver-1.0.11/work/alsa-driver-1.0.11/acore'
make: *** [compile] Error 1

!!! ERROR: media-sound/alsa-driver-1.0.11 failed.
Call stack:
  ebuild.sh, line 1546:   Called dyn_compile
  ebuild.sh, line 937:   Called src_compile
  alsa-driver-1.0.11.ebuild, line 109:   Called die

!!! Make Failed
!!! If you need support, post the topmost build error, and the call stack if relevant.