12 #define iterate_iovec(i, n, __v, __p, skip, STEP) {	\  argument
16 	__v.iov_len = min(n, __p->iov_len - skip);	\
18 		__v.iov_base = __p->iov_base + skip;	\
21 		skip += __v.iov_len;			\
34 		skip = __v.iov_len;			\
40 #define iterate_kvec(i, n, __v, __p, skip, STEP) {	\  argument
43 	__v.iov_len = min(n, __p->iov_len - skip);	\
45 		__v.iov_base = __p->iov_base + skip;	\
47 		skip += __v.iov_len;			\
57 		skip = __v.iov_len;			\
63 #define iterate_bvec(i, n, __v, __bi, skip, STEP) {	\  argument
66 	__start.bi_bvec_done = skip;			\
77 		size_t skip = i->iov_offset;			\
81 			iterate_bvec(i, n, v, __bi, skip, (B))	\
85 			iterate_kvec(i, n, v, kvec, skip, (K))	\
89 			iterate_iovec(i, n, v, iov, skip, (I))	\
98 		size_t skip = i->iov_offset;			\
103 			iterate_bvec(i, n, v, __bi, skip, (B))	\
106 			skip = __bi.bi_bvec_done;		\
110 			iterate_kvec(i, n, v, kvec, skip, (K))	\
111 			if (skip == kvec->iov_len) {		\
113 				skip = 0;			\
120 			iterate_iovec(i, n, v, iov, skip, (I))	\
121 			if (skip == iov->iov_len) {		\
123 				skip = 0;			\
129 		i->iov_offset = skip;				\
154 	size_t skip, copy, left, wanted;  in copy_page_to_iter_iovec()  local
168 	skip = i->iov_offset;  in copy_page_to_iter_iovec()
169 	buf = iov->iov_base + skip;  in copy_page_to_iter_iovec()
170 	copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
179 		skip += copy;  in copy_page_to_iter_iovec()
189 			skip = copy;  in copy_page_to_iter_iovec()
200 		copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
208 	skip += copy;  in copy_page_to_iter_iovec()
217 		skip = copy;  in copy_page_to_iter_iovec()
224 	if (skip == iov->iov_len) {  in copy_page_to_iter_iovec()
226 		skip = 0;  in copy_page_to_iter_iovec()
231 	i->iov_offset = skip;  in copy_page_to_iter_iovec()
238 	size_t skip, copy, left, wanted;  in copy_page_from_iter_iovec()  local
252 	skip = i->iov_offset;  in copy_page_from_iter_iovec()
253 	buf = iov->iov_base + skip;  in copy_page_from_iter_iovec()
254 	copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
263 		skip += copy;  in copy_page_from_iter_iovec()
273 			skip = copy;  in copy_page_from_iter_iovec()
284 		copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
292 	skip += copy;  in copy_page_from_iter_iovec()
301 		skip = copy;  in copy_page_from_iter_iovec()
308 	if (skip == iov->iov_len) {  in copy_page_from_iter_iovec()
310 		skip = 0;  in copy_page_from_iter_iovec()
315 	i->iov_offset = skip;  in copy_page_from_iter_iovec()
415 	size_t skip = i->iov_offset;  in iov_iter_fault_in_readable()  local
421 		iterate_iovec(i, bytes, v, iov, skip, ({  in iov_iter_fault_in_readable()