#ifndef _ASM_M68K_FUTEX_H
#define _ASM_M68K_FUTEX_H

#ifdef __KERNEL__
#if !defined(CONFIG_MMU)
#include <asm-generic/futex.h>
#else /* CONFIG_MMU */

#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>

static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
u32 oldval, u32 newval)
{
u32 val;

if (unlikely(get_user(val, uaddr) != 0))
return -EFAULT;

if (val == oldval && unlikely(put_user(newval, uaddr) != 0))
return -EFAULT;

*uval = val;

return 0;
}

static inline int
futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval, ret;
u32 tmp;

if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;

pagefault_disable(); /* implies preempt_disable() */

ret = -EFAULT;
if (unlikely(get_user(oldval, uaddr) != 0))
goto out_pagefault_enable;

ret = 0;
tmp = oldval;

switch (op) {
case FUTEX_OP_SET:
tmp = oparg;
break;
case FUTEX_OP_ADD:
tmp += oparg;
break;
case FUTEX_OP_OR:
tmp |= oparg;
break;
case FUTEX_OP_ANDN:
tmp &= ~oparg;
break;
case FUTEX_OP_XOR:
tmp ^= oparg;
break;
default:
ret = -ENOSYS;
}

if (ret == 0 && unlikely(put_user(tmp, uaddr) != 0))
ret = -EFAULT;

out_pagefault_enable:
pagefault_enable(); /* subsumes preempt_enable() */

if (ret == 0) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
return ret;
}

#endif /* CONFIG_MMU */
#endif /* __KERNEL__ */
#endif /* _ASM_M68K_FUTEX_H */