11 #define iterate_iovec(i, n, __v, __p, skip, STEP) {	\  argument
15 	__v.iov_len = min(n, __p->iov_len - skip);	\
17 		__v.iov_base = __p->iov_base + skip;	\
20 		skip += __v.iov_len;			\
33 		skip = __v.iov_len;			\
39 #define iterate_kvec(i, n, __v, __p, skip, STEP) {	\  argument
42 	__v.iov_len = min(n, __p->iov_len - skip);	\
44 		__v.iov_base = __p->iov_base + skip;	\
46 		skip += __v.iov_len;			\
56 		skip = __v.iov_len;			\
62 #define iterate_bvec(i, n, __v, __bi, skip, STEP) {	\  argument
65 	__start.bi_bvec_done = skip;			\
75 	size_t skip = i->iov_offset;				\
79 		iterate_bvec(i, n, v, __bi, skip, (B))		\
83 		iterate_kvec(i, n, v, kvec, skip, (K))		\
87 		iterate_iovec(i, n, v, iov, skip, (I))		\
95 		size_t skip = i->iov_offset;			\
100 			iterate_bvec(i, n, v, __bi, skip, (B))	\
103 			skip = __bi.bi_bvec_done;		\
107 			iterate_kvec(i, n, v, kvec, skip, (K))	\
108 			if (skip == kvec->iov_len) {		\
110 				skip = 0;			\
117 			iterate_iovec(i, n, v, iov, skip, (I))	\
118 			if (skip == iov->iov_len) {		\
120 				skip = 0;			\
126 		i->iov_offset = skip;				\
133 	size_t skip, copy, left, wanted;  in copy_page_to_iter_iovec()  local
146 	skip = i->iov_offset;  in copy_page_to_iter_iovec()
147 	buf = iov->iov_base + skip;  in copy_page_to_iter_iovec()
148 	copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
157 		skip += copy;  in copy_page_to_iter_iovec()
167 			skip = copy;  in copy_page_to_iter_iovec()
178 		copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
186 	skip += copy;  in copy_page_to_iter_iovec()
195 		skip = copy;  in copy_page_to_iter_iovec()
202 	if (skip == iov->iov_len) {  in copy_page_to_iter_iovec()
204 		skip = 0;  in copy_page_to_iter_iovec()
209 	i->iov_offset = skip;  in copy_page_to_iter_iovec()
216 	size_t skip, copy, left, wanted;  in copy_page_from_iter_iovec()  local
229 	skip = i->iov_offset;  in copy_page_from_iter_iovec()
230 	buf = iov->iov_base + skip;  in copy_page_from_iter_iovec()
231 	copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
240 		skip += copy;  in copy_page_from_iter_iovec()
250 			skip = copy;  in copy_page_from_iter_iovec()
261 		copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
269 	skip += copy;  in copy_page_from_iter_iovec()
278 		skip = copy;  in copy_page_from_iter_iovec()
285 	if (skip == iov->iov_len) {  in copy_page_from_iter_iovec()
287 		skip = 0;  in copy_page_from_iter_iovec()
292 	i->iov_offset = skip;  in copy_page_from_iter_iovec()
392 	size_t skip = i->iov_offset;  in iov_iter_fault_in_readable()  local
398 		iterate_iovec(i, bytes, v, iov, skip, ({  in iov_iter_fault_in_readable()