161 	char __user *buf;  in copy_page_to_iter_iovec()  local
174 	buf = iov->iov_base + skip;  in copy_page_to_iter_iovec()
177 	if (IS_ENABLED(CONFIG_HIGHMEM) && !fault_in_pages_writeable(buf, copy)) {  in copy_page_to_iter_iovec()
182 		left = copyout(buf, from, copy);  in copy_page_to_iter_iovec()
190 			buf = iov->iov_base;  in copy_page_to_iter_iovec()
192 			left = copyout(buf, from, copy);  in copy_page_to_iter_iovec()
203 		buf += copy;  in copy_page_to_iter_iovec()
211 	left = copyout(buf, from, copy);  in copy_page_to_iter_iovec()
218 		buf = iov->iov_base;  in copy_page_to_iter_iovec()
220 		left = copyout(buf, from, copy);  in copy_page_to_iter_iovec()
245 	char __user *buf;  in copy_page_from_iter_iovec()  local
258 	buf = iov->iov_base + skip;  in copy_page_from_iter_iovec()
261 	if (IS_ENABLED(CONFIG_HIGHMEM) && !fault_in_pages_readable(buf, copy)) {  in copy_page_from_iter_iovec()
266 		left = copyin(to, buf, copy);  in copy_page_from_iter_iovec()
274 			buf = iov->iov_base;  in copy_page_from_iter_iovec()
276 			left = copyin(to, buf, copy);  in copy_page_from_iter_iovec()
287 		buf += copy;  in copy_page_from_iter_iovec()
295 	left = copyin(to, buf, copy);  in copy_page_from_iter_iovec()
302 		buf = iov->iov_base;  in copy_page_from_iter_iovec()
304 		left = copyin(to, buf, copy);  in copy_page_from_iter_iovec()
371 	struct pipe_buffer *buf;  in copy_page_to_iter_pipe()  local
386 	buf = &pipe->bufs[idx];  in copy_page_to_iter_pipe()
388 		if (offset == off && buf->page == page) {  in copy_page_to_iter_pipe()
390 			buf->len += bytes;  in copy_page_to_iter_pipe()
395 		buf = &pipe->bufs[idx];  in copy_page_to_iter_pipe()
400 	buf->ops = &page_cache_pipe_buf_ops;  in copy_page_to_iter_pipe()
401 	get_page(buf->page = page);  in copy_page_to_iter_pipe()
402 	buf->offset = offset;  in copy_page_to_iter_pipe()
403 	buf->len = bytes;  in copy_page_to_iter_pipe()
478 static inline bool allocated(struct pipe_buffer *buf)  in allocated()  argument
480 	return buf->ops == &default_pipe_buf_ops;  in allocated()
1013 		struct pipe_buffer *buf;  in pipe_advance()  local
1019 			buf = &pipe->bufs[idx];  in pipe_advance()
1020 			if (left <= buf->len)  in pipe_advance()
1022 			left -= buf->len;  in pipe_advance()
1026 		i->iov_offset = buf->offset + left;  in pipe_advance()
1683 int import_single_range(int rw, void __user *buf, size_t len,  in import_single_range()  argument
1688 	if (unlikely(!access_ok(buf, len)))  in import_single_range()
1691 	iov->iov_base = buf;  in import_single_range()