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futex-irq.h

#ifndef __ASM_SH_FUTEX_IRQ_H
#define __ASM_SH_FUTEX_IRQ_H

#include <asm/system.h>

static inline int atomic_futex_op_xchg_set(int oparg, int __user *uaddr,
                                 int *oldval)
{
      unsigned long flags;
      int ret;

      local_irq_save(flags);

      ret = get_user(*oldval, uaddr);
      if (!ret)
            ret = put_user(oparg, uaddr);

      local_irq_restore(flags);

      return ret;
}

static inline int atomic_futex_op_xchg_add(int oparg, int __user *uaddr,
                                 int *oldval)
{
      unsigned long flags;
      int ret;

      local_irq_save(flags);

      ret = get_user(*oldval, uaddr);
      if (!ret)
            ret = put_user(*oldval + oparg, uaddr);

      local_irq_restore(flags);

      return ret;
}

static inline int atomic_futex_op_xchg_or(int oparg, int __user *uaddr,
                                int *oldval)
{
      unsigned long flags;
      int ret;

      local_irq_save(flags);

      ret = get_user(*oldval, uaddr);
      if (!ret)
            ret = put_user(*oldval | oparg, uaddr);

      local_irq_restore(flags);

      return ret;
}

static inline int atomic_futex_op_xchg_and(int oparg, int __user *uaddr,
                                 int *oldval)
{
      unsigned long flags;
      int ret;

      local_irq_save(flags);

      ret = get_user(*oldval, uaddr);
      if (!ret)
            ret = put_user(*oldval & oparg, uaddr);

      local_irq_restore(flags);

      return ret;
}

static inline int atomic_futex_op_xchg_xor(int oparg, int __user *uaddr,
                                 int *oldval)
{
      unsigned long flags;
      int ret;

      local_irq_save(flags);

      ret = get_user(*oldval, uaddr);
      if (!ret)
            ret = put_user(*oldval ^ oparg, uaddr);

      local_irq_restore(flags);

      return ret;
}

static inline int atomic_futex_op_cmpxchg_inatomic(int __user *uaddr,
                                       int oldval, int newval)
{
      unsigned long flags;
      int ret, prev = 0;

      local_irq_save(flags);

      ret = get_user(prev, uaddr);
      if (!ret && oldval == prev)
            ret = put_user(newval, uaddr);

      local_irq_restore(flags);

      if (ret)
            return ret;

      return prev;
}

#endif /* __ASM_SH_FUTEX_IRQ_H */

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