-#define PREEMPT_SHIFT 0
-#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)
-#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
-
-#define __MASK(x) ((1UL << (x))-1)
-
-#define PREEMPT_MASK (__MASK(PREEMPT_BITS) << PREEMPT_SHIFT)
-#define HARDIRQ_MASK (__MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT)
-#define SOFTIRQ_MASK (__MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT)
-
-#define hardirq_count() (preempt_count() & HARDIRQ_MASK)
-#define softirq_count() (preempt_count() & SOFTIRQ_MASK)
-#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK))
-
-#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT)
-#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT)
-#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT)
-
-/*
- * The hardirq mask has to be large enough to have
- * space for potentially all IRQ sources in the system
- * nesting on a single CPU:
- */
-#if (1 << HARDIRQ_BITS) < NR_IRQS
-# error HARDIRQ_BITS is too low!
-#endif
-
-/*
- * Are we doing bottom half or hardware interrupt processing?
- * Are we in a softirq context? Interrupt context?
- */
-#define in_irq() (hardirq_count())
-#define in_softirq() (softirq_count())
-#define in_interrupt() (irq_count())
-
-
-#define hardirq_trylock() (!in_interrupt())
-#define hardirq_endlock() do { } while (0)
-
-#define irq_enter() (preempt_count() += HARDIRQ_OFFSET)
-
-#ifdef CONFIG_PREEMPT
-# include <linux/smp_lock.h>
-# define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())
-# define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)
-#else
-# define in_atomic() (preempt_count() != 0)
-# define IRQ_EXIT_OFFSET HARDIRQ_OFFSET
-#endif
-#define irq_exit() \
-do { \
- preempt_count() -= IRQ_EXIT_OFFSET; \
- if (!in_interrupt() && softirq_pending(smp_processor_id())) \
- do_softirq(); \
- preempt_enable_no_resched(); \
-} while (0)
-
-#ifndef CONFIG_SMP
-# define synchronize_irq(irq) barrier()
-#else
- extern void synchronize_irq(unsigned int irq);
-#endif /* CONFIG_SMP */
-