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atomic-irq.h

#ifndef __ASM_SH_ATOMIC_IRQ_H
#define __ASM_SH_ATOMIC_IRQ_H

/*
 * To get proper branch prediction for the main line, we must branch
 * forward to code at the end of this object's .text section, then
 * branch back to restart the operation.
 */
static inline void atomic_add(int i, atomic_t *v)
{
      unsigned long flags;

      local_irq_save(flags);
      *(long *)v += i;
      local_irq_restore(flags);
}

static inline void atomic_sub(int i, atomic_t *v)
{
      unsigned long flags;

      local_irq_save(flags);
      *(long *)v -= i;
      local_irq_restore(flags);
}

static inline int atomic_add_return(int i, atomic_t *v)
{
      unsigned long temp, flags;

      local_irq_save(flags);
      temp = *(long *)v;
      temp += i;
      *(long *)v = temp;
      local_irq_restore(flags);

      return temp;
}

static inline int atomic_sub_return(int i, atomic_t *v)
{
      unsigned long temp, flags;

      local_irq_save(flags);
      temp = *(long *)v;
      temp -= i;
      *(long *)v = temp;
      local_irq_restore(flags);

      return temp;
}

static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
      unsigned long flags;

      local_irq_save(flags);
      *(long *)v &= ~mask;
      local_irq_restore(flags);
}

static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
      unsigned long flags;

      local_irq_save(flags);
      *(long *)v |= mask;
      local_irq_restore(flags);
}

#endif /* __ASM_SH_ATOMIC_IRQ_H */

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