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ARM Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life (Terry Pratchett, Jingo)

#ifdef __SMP__
#error "Me no hablo Alpha SMP"
#else
#define irq_enter(cpu, irq) (++local_irq_count[cpu])
#define irq_exit(cpu, irq) (--local_irq_count[cpu])
#endif
-- from kernel 2.1.90, arch/alpha/kernel/irc.c