163  * Total number of bytes covered by an iovec.
180 				  size_t bytes, struct iov_iter *i);
181 void iov_iter_advance(struct iov_iter *i, size_t bytes);
182 void iov_iter_revert(struct iov_iter *i, size_t bytes);
183 size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t bytes);
184 size_t fault_in_iov_iter_writeable(const struct iov_iter *i, size_t bytes);
186 size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
188 size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
191 size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
192 size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i);
193 size_t _copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i);
196 		size_t bytes, struct iov_iter *i)  in copy_folio_to_iter()  argument
198 	return copy_page_to_iter(&folio->page, offset, bytes, i);  in copy_folio_to_iter()
202 					  size_t bytes, struct iov_iter *i)  in copy_folio_from_iter()  argument
204 	return copy_page_from_iter(&folio->page, offset, bytes, i);  in copy_folio_from_iter()
208 		size_t offset, size_t bytes, struct iov_iter *i)  in copy_folio_from_iter_atomic()  argument
210 	return copy_page_from_iter_atomic(&folio->page, offset, bytes, i);  in copy_folio_from_iter_atomic()
214 				 size_t bytes, struct iov_iter *i);
217 size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i)  in copy_to_iter()  argument
219 	if (check_copy_size(addr, bytes, true))  in copy_to_iter()
220 		return _copy_to_iter(addr, bytes, i);  in copy_to_iter()
225 size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)  in copy_from_iter()  argument
227 	if (check_copy_size(addr, bytes, false))  in copy_from_iter()
228 		return _copy_from_iter(addr, bytes, i);  in copy_from_iter()
233 bool copy_to_iter_full(const void *addr, size_t bytes, struct iov_iter *i)  in copy_to_iter_full()  argument
235 	size_t copied = copy_to_iter(addr, bytes, i);  in copy_to_iter_full()
236 	if (likely(copied == bytes))  in copy_to_iter_full()
243 bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)  in copy_from_iter_full()  argument
245 	size_t copied = copy_from_iter(addr, bytes, i);  in copy_from_iter_full()
246 	if (likely(copied == bytes))  in copy_from_iter_full()
253 size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i)  in copy_from_iter_nocache()  argument
255 	if (check_copy_size(addr, bytes, false))  in copy_from_iter_nocache()
256 		return _copy_from_iter_nocache(addr, bytes, i);  in copy_from_iter_nocache()
261 bool copy_from_iter_full_nocache(void *addr, size_t bytes, struct iov_iter *i)  in copy_from_iter_full_nocache()  argument
263 	size_t copied = copy_from_iter_nocache(addr, bytes, i);  in copy_from_iter_full_nocache()
264 	if (likely(copied == bytes))  in copy_from_iter_full_nocache()
277 size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i);
283 size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
288 size_t iov_iter_zero(size_t bytes, struct iov_iter *);