gcc -D__KERNEL__ -I/usr/src/linux-2.5.4/include -Wall
-Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2
-march=i686 -DKBUILD_BASENAME=sched -fno-omit-frame-pointer -c -o
sched.o sched.c
sched.c: In function `schedule':
sched.c:664: `global_irq_holder' undeclared (first use in this function)
sched.c:664: (Each undeclared identifier is reported only once
sched.c:664: for each function it appears in.)
make[2]: *** [sched.o] Error 1
make[2]: Leaving directory `/usr/src/linux-2.5.4/kernel'
make[1]: *** [first_rule] Error 2
make[1]: Leaving directory `/usr/src/linux-2.5.4/kernel'
make: *** [_dir_kernel] Error 2