New Build problem in sched.c in 2.5.23 on an Alpha

["Oliver Pitzeier" <o.pitzeier@uptime.at>]

I got another problem in sched.c

In file included from sched.c:26:
make[1]: Entering directory `/usr/src/linux-2.5.23/kernel'
  gcc -Wp,-MD,./.sched.o.d -D__KERNEL__ -I/usr/src/linux-2.5.23/include
-Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing
-fno-common -fomit-frame-pointer -pipe -mno-fp-regs -ffixed-8 -mcpu=ev5
-Wa,-mev6 -nostdinc -iwithprefix include    -fno-omit-frame-pointer
-DKBUILD_BASENAME=sched   -c -o sched.o sched.c
In file included from sched.c:26:
/usr/src/linux-2.5.23/include/asm/mmu_context.h: In function
`init_new_context':
/usr/src/linux-2.5.23/include/asm/mmu_context.h:230: `smp_num_cpus'
undeclared (first use in this function)
/usr/src/linux-2.5.23/include/asm/mmu_context.h:230: (Each undeclared
identifier is reported only once
/usr/src/linux-2.5.23/include/asm/mmu_context.h:230: for each function
it appears in.)
/usr/src/linux-2.5.23/include/asm/mmu_context.h:231: warning: implicit
declaration of function `cpu_logical_map'
sched.c: In function `try_to_wake_up':
sched.c:362: warning: label `repeat_lock_task' defined but not used
sched.c: In function `schedule':
sched.c:822: warning: implicit declaration of function
`prepare_arch_schedule'
sched.c:879: warning: implicit declaration of function
`prepare_arch_switch'
sched.c:883: warning: implicit declaration of function
`finish_arch_switch'
sched.c:886: warning: implicit declaration of function
`finish_arch_schedule'
make[1]: *** [sched.o] Error 1
make[1]: Leaving directory `/usr/src/linux-2.5.23/kernel'
make: *** [kernel] Error 2

Any ideas?

Greetz,
 Oliver