futex-irq.h

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#ifndef __ASM_SH_FUTEX_IRQ_H
#define __ASM_SH_FUTEX_IRQ_H


static inline int atomic_futex_op_xchg_set(int oparg, u32 __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, u32 __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, u32 __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, u32 __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, u32 __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(u32 *uval,
                           u32 __user *uaddr,
                           u32 oldval, u32 newval)
{
    unsigned long flags;
    int ret;
    u32 prev = 0;

    local_irq_save(flags);

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

    local_irq_restore(flags);

    *uval = prev;
    return ret;
}

#endif /* __ASM_SH_FUTEX_IRQ_H */