parisc: fix copy_from_user()

#include <asm-generic/uaccess-unaligned.h>

#include <linux/bug.h>

#include <linux/string.h>

#define VERIFY_READ 0

#define VERIFY_WRITE 1

                                          unsigned long n)

{

        int sz = __compiletime_object_size(to);

        int ret = -EFAULT;

        unsigned long ret = n;

        if (likely(sz == -1 || !__builtin_constant_p(n) || sz >= n))

                ret = __copy_from_user(to, from, n);

        else

                copy_from_user_overflow();

	if (unlikely(ret))

		memset(to + (n - ret), 0, ret);

        return ret;

}