1709 	struct uffdio_copy uffdio_copy;  in userfaultfd_copy()  local
1710 	struct uffdio_copy __user *user_uffdio_copy;  in userfaultfd_copy()
1713 	user_uffdio_copy = (struct uffdio_copy __user *) arg;  in userfaultfd_copy()
1720 	if (copy_from_user(&uffdio_copy, user_uffdio_copy,  in userfaultfd_copy()
1722 			   sizeof(uffdio_copy)-sizeof(__s64)))  in userfaultfd_copy()
1725 	ret = validate_range(ctx->mm, uffdio_copy.dst, uffdio_copy.len);  in userfaultfd_copy()
1734 	if (uffdio_copy.src + uffdio_copy.len <= uffdio_copy.src)  in userfaultfd_copy()
1736 	if (uffdio_copy.mode & ~(UFFDIO_COPY_MODE_DONTWAKE|UFFDIO_COPY_MODE_WP))  in userfaultfd_copy()
1739 		ret = mcopy_atomic(ctx->mm, uffdio_copy.dst, uffdio_copy.src,  in userfaultfd_copy()
1740 				   uffdio_copy.len, &ctx->mmap_changing,  in userfaultfd_copy()
1741 				   uffdio_copy.mode);  in userfaultfd_copy()
1753 	if (!(uffdio_copy.mode & UFFDIO_COPY_MODE_DONTWAKE)) {  in userfaultfd_copy()
1754 		range.start = uffdio_copy.dst;  in userfaultfd_copy()
1757 	ret = range.len == uffdio_copy.len ? 0 : -EAGAIN;  in userfaultfd_copy()