Differential D20772 Diff 59707 head/sys/i386/i386/copyout.c

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head/sys/i386/i386/copyout.c

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	{			{

	return (suword(base, word));			return (suword(base, word));
	}			}

	struct casueword_arg0 {			struct casueword_arg0 {
	uint32_t oldval;			uint32_t oldval;
	uint32_t newval;			uint32_t newval;
				int res;
	};			};

	static void			static void
	casueword_slow0(vm_offset_t kva, void *arg)			casueword_slow0(vm_offset_t kva, void *arg)
	{			{
	struct casueword_arg0 *ca;			struct casueword_arg0 *ca;

	ca = arg;			ca = arg;
	atomic_fcmpset_int((u_int *)kva, &ca->oldval, ca->newval);			ca->res = 1 - atomic_fcmpset_int((u_int *)kva, &ca->oldval,
				ca->newval);
	}			}

	int			int
	casueword32(volatile uint32_t base, uint32_t oldval, uint32_t oldvalp,			casueword32(volatile uint32_t base, uint32_t oldval, uint32_t oldvalp,
	uint32_t newval)			uint32_t newval)
	{			{
	struct casueword_arg0 ca;			struct casueword_arg0 ca;
	int res;			int res;

	ca.oldval = oldval;			ca.oldval = oldval;
	ca.newval = newval;			ca.newval = newval;
	res = cp_slow0((vm_offset_t)base, sizeof(int32_t), true,			res = cp_slow0((vm_offset_t)base, sizeof(int32_t), true,
	casueword_slow0, &ca);			casueword_slow0, &ca);
	if (res == 0) {			if (res == 0) {
	*oldvalp = ca.oldval;			*oldvalp = ca.oldval;
	return (0);			return (ca.res);
	}			}
	return (-1);			return (-1);
	}			}

	int			int
	casueword(volatile u_long base, u_long oldval, u_long oldvalp, u_long newval)			casueword(volatile u_long base, u_long oldval, u_long oldvalp, u_long newval)
	{			{
	struct casueword_arg0 ca;			struct casueword_arg0 ca;
	int res;			int res;

	ca.oldval = oldval;			ca.oldval = oldval;
	ca.newval = newval;			ca.newval = newval;
	res = cp_slow0((vm_offset_t)base, sizeof(int32_t), true,			res = cp_slow0((vm_offset_t)base, sizeof(int32_t), true,
	casueword_slow0, &ca);			casueword_slow0, &ca);
	if (res == 0) {			if (res == 0) {
	*oldvalp = ca.oldval;			*oldvalp = ca.oldval;
	return (0);			return (ca.res);
	}			}
	return (-1);			return (-1);
	}			}