18 #define iterate_iovec(i, n, __v, __p, skip, STEP) {	\  argument
22 	__v.iov_len = min(n, __p->iov_len - skip);	\
24 		__v.iov_base = __p->iov_base + skip;	\
27 		skip += __v.iov_len;			\
40 		skip = __v.iov_len;			\
46 #define iterate_kvec(i, n, __v, __p, skip, STEP) {	\  argument
49 	__v.iov_len = min(n, __p->iov_len - skip);	\
51 		__v.iov_base = __p->iov_base + skip;	\
53 		skip += __v.iov_len;			\
63 		skip = __v.iov_len;			\
69 #define iterate_bvec(i, n, __v, __bi, skip, STEP) {	\  argument
72 	__start.bi_bvec_done = skip;			\
83 		size_t skip = i->iov_offset;			\
87 			iterate_bvec(i, n, v, __bi, skip, (B))	\
91 			iterate_kvec(i, n, v, kvec, skip, (K))	\
96 			iterate_iovec(i, n, v, iov, skip, (I))	\
105 		size_t skip = i->iov_offset;			\
110 			iterate_bvec(i, n, v, __bi, skip, (B))	\
113 			skip = __bi.bi_bvec_done;		\
117 			iterate_kvec(i, n, v, kvec, skip, (K))	\
118 			if (skip == kvec->iov_len) {		\
120 				skip = 0;			\
125 			skip += n;				\
129 			iterate_iovec(i, n, v, iov, skip, (I))	\
130 			if (skip == iov->iov_len) {		\
132 				skip = 0;			\
138 		i->iov_offset = skip;				\
167 	size_t skip, copy, left, wanted;  in copy_page_to_iter_iovec()  local
181 	skip = i->iov_offset;  in copy_page_to_iter_iovec()
182 	buf = iov->iov_base + skip;  in copy_page_to_iter_iovec()
183 	copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
192 		skip += copy;  in copy_page_to_iter_iovec()
202 			skip = copy;  in copy_page_to_iter_iovec()
213 		copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
221 	skip += copy;  in copy_page_to_iter_iovec()
230 		skip = copy;  in copy_page_to_iter_iovec()
237 	if (skip == iov->iov_len) {  in copy_page_to_iter_iovec()
239 		skip = 0;  in copy_page_to_iter_iovec()
244 	i->iov_offset = skip;  in copy_page_to_iter_iovec()
251 	size_t skip, copy, left, wanted;  in copy_page_from_iter_iovec()  local
265 	skip = i->iov_offset;  in copy_page_from_iter_iovec()
266 	buf = iov->iov_base + skip;  in copy_page_from_iter_iovec()
267 	copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
276 		skip += copy;  in copy_page_from_iter_iovec()
286 			skip = copy;  in copy_page_from_iter_iovec()
297 		copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
305 	skip += copy;  in copy_page_from_iter_iovec()
314 		skip = copy;  in copy_page_from_iter_iovec()
321 	if (skip == iov->iov_len) {  in copy_page_from_iter_iovec()
323 		skip = 0;  in copy_page_from_iter_iovec()
328 	i->iov_offset = skip;  in copy_page_from_iter_iovec()
433 	size_t skip = i->iov_offset;  in iov_iter_fault_in_readable()  local
439 		iterate_iovec(i, bytes, v, iov, skip, ({  in iov_iter_fault_in_readable()