#ifndef _ALPHA_LOCAL_H
  #define _ALPHA_LOCAL_H
  
  #include <linux/percpu.h>
  #include <asm/atomic.h>

  typedef struct
  {
  	atomic_long_t a;
  } local_t;

  #define LOCAL_INIT(i)	{ ATOMIC_LONG_INIT(i) }
  #define local_read(l)	atomic_long_read(&(l)->a)
  #define local_set(l,i)	atomic_long_set(&(l)->a, (i))
  #define local_inc(l)	atomic_long_inc(&(l)->a)
  #define local_dec(l)	atomic_long_dec(&(l)->a)
  #define local_add(i,l)	atomic_long_add((i),(&(l)->a))
  #define local_sub(i,l)	atomic_long_sub((i),(&(l)->a))

  static __inline__ long local_add_return(long i, local_t * l)
  {
  	long temp, result;
  	__asm__ __volatile__(
  	"1:	ldq_l %0,%1
  "
  	"	addq %0,%3,%2
  "
  	"	addq %0,%3,%0
  "
  	"	stq_c %0,%1
  "
  	"	beq %0,2f
  "
  	".subsection 2
  "
  	"2:	br 1b
  "
  	".previous"
  	:"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
  	:"Ir" (i), "m" (l->a.counter) : "memory");
  	return result;
  }

  static __inline__ long local_sub_return(long i, local_t * l)
  {
  	long temp, result;
  	__asm__ __volatile__(
  	"1:	ldq_l %0,%1
  "
  	"	subq %0,%3,%2
  "
  	"	subq %0,%3,%0
  "
  	"	stq_c %0,%1
  "
  	"	beq %0,2f
  "
  	".subsection 2
  "
  	"2:	br 1b
  "
  	".previous"
  	:"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
  	:"Ir" (i), "m" (l->a.counter) : "memory");
  	return result;
  }
  
  #define local_cmpxchg(l, o, n) \
  	(cmpxchg_local(&((l)->a.counter), (o), (n)))
  #define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n)))
  
  /**
   * local_add_unless - add unless the number is a given value
   * @l: pointer of type local_t
   * @a: the amount to add to l...
   * @u: ...unless l is equal to u.
   *
   * Atomically adds @a to @l, so long as it was not @u.
   * Returns non-zero if @l was not @u, and zero otherwise.
   */
  #define local_add_unless(l, a, u)				\
  ({								\
  	long c, old;						\
  	c = local_read(l);					\
  	for (;;) {						\
  		if (unlikely(c == (u)))				\
  			break;					\
  		old = local_cmpxchg((l), c, c + (a));	\
  		if (likely(old == c))				\
  			break;					\
  		c = old;					\
  	}							\
  	c != (u);						\
  })
  #define local_inc_not_zero(l) local_add_unless((l), 1, 0)
  
  #define local_add_negative(a, l) (local_add_return((a), (l)) < 0)
  
  #define local_dec_return(l) local_sub_return(1,(l))
  
  #define local_inc_return(l) local_add_return(1,(l))
  
  #define local_sub_and_test(i,l) (local_sub_return((i), (l)) == 0)
  
  #define local_inc_and_test(l) (local_add_return(1, (l)) == 0)
  
  #define local_dec_and_test(l) (local_sub_return(1, (l)) == 0)
  
  /* Verify if faster than atomic ops */
  #define __local_inc(l)		((l)->a.counter++)
  #define __local_dec(l)		((l)->a.counter++)
  #define __local_add(i,l)	((l)->a.counter+=(i))
  #define __local_sub(i,l)	((l)->a.counter-=(i))

  
  /* Use these for per-cpu local_t variables: on some archs they are
   * much more efficient than these naive implementations.  Note they take
   * a variable, not an address.
   */

  #define cpu_local_read(l)	local_read(&__get_cpu_var(l))
  #define cpu_local_set(l, i)	local_set(&__get_cpu_var(l), (i))
  
  #define cpu_local_inc(l)	local_inc(&__get_cpu_var(l))
  #define cpu_local_dec(l)	local_dec(&__get_cpu_var(l))
  #define cpu_local_add(i, l)	local_add((i), &__get_cpu_var(l))
  #define cpu_local_sub(i, l)	local_sub((i), &__get_cpu_var(l))
  
  #define __cpu_local_inc(l)	__local_inc(&__get_cpu_var(l))
  #define __cpu_local_dec(l)	__local_dec(&__get_cpu_var(l))
  #define __cpu_local_add(i, l)	__local_add((i), &__get_cpu_var(l))
  #define __cpu_local_sub(i, l)	__local_sub((i), &__get_cpu_var(l))

  
  #endif /* _ALPHA_LOCAL_H */