8 #define iterate_iovec(i, n, __v, __p, skip, STEP) {	\  argument
12 	__v.iov_len = min(n, __p->iov_len - skip);	\
14 		__v.iov_base = __p->iov_base + skip;	\
17 		skip += __v.iov_len;			\
30 		skip = __v.iov_len;			\
36 #define iterate_kvec(i, n, __v, __p, skip, STEP) {	\  argument
39 	__v.iov_len = min(n, __p->iov_len - skip);	\
41 		__v.iov_base = __p->iov_base + skip;	\
43 		skip += __v.iov_len;			\
53 		skip = __v.iov_len;			\
59 #define iterate_bvec(i, n, __v, __p, skip, STEP) {	\  argument
62 	__v.bv_len = min_t(size_t, n, __p->bv_len - skip);	\
65 		__v.bv_offset = __p->bv_offset + skip; 	\
67 		skip += __v.bv_len;			\
78 		skip = __v.bv_len;			\
85 	size_t skip = i->iov_offset;				\
89 		iterate_bvec(i, n, v, bvec, skip, (B))		\
93 		iterate_kvec(i, n, v, kvec, skip, (K))		\
97 		iterate_iovec(i, n, v, iov, skip, (I))		\
102 	size_t skip = i->iov_offset;				\
106 		iterate_bvec(i, n, v, bvec, skip, (B))		\
107 		if (skip == bvec->bv_len) {			\
109 			skip = 0;				\
116 		iterate_kvec(i, n, v, kvec, skip, (K))		\
117 		if (skip == kvec->iov_len) {			\
119 			skip = 0;				\
126 		iterate_iovec(i, n, v, iov, skip, (I))		\
127 		if (skip == iov->iov_len) {			\
129 			skip = 0;				\
135 	i->iov_offset = skip;					\
141 	size_t skip, copy, left, wanted;  in copy_page_to_iter_iovec()  local
154 	skip = i->iov_offset;  in copy_page_to_iter_iovec()
155 	buf = iov->iov_base + skip;  in copy_page_to_iter_iovec()
156 	copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
165 		skip += copy;  in copy_page_to_iter_iovec()
175 			skip = copy;  in copy_page_to_iter_iovec()
186 		copy = min(bytes, iov->iov_len - skip);  in copy_page_to_iter_iovec()
193 	skip += copy;  in copy_page_to_iter_iovec()
202 		skip = copy;  in copy_page_to_iter_iovec()
208 	if (skip == iov->iov_len) {  in copy_page_to_iter_iovec()
210 		skip = 0;  in copy_page_to_iter_iovec()
215 	i->iov_offset = skip;  in copy_page_to_iter_iovec()
222 	size_t skip, copy, left, wanted;  in copy_page_from_iter_iovec()  local
235 	skip = i->iov_offset;  in copy_page_from_iter_iovec()
236 	buf = iov->iov_base + skip;  in copy_page_from_iter_iovec()
237 	copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
246 		skip += copy;  in copy_page_from_iter_iovec()
256 			skip = copy;  in copy_page_from_iter_iovec()
267 		copy = min(bytes, iov->iov_len - skip);  in copy_page_from_iter_iovec()
274 	skip += copy;  in copy_page_from_iter_iovec()
283 		skip = copy;  in copy_page_from_iter_iovec()
289 	if (skip == iov->iov_len) {  in copy_page_from_iter_iovec()
291 		skip = 0;  in copy_page_from_iter_iovec()
296 	i->iov_offset = skip;  in copy_page_from_iter_iovec()
309 	size_t skip = i->iov_offset;  in iov_iter_fault_in_readable()  local
315 		iterate_iovec(i, bytes, v, iov, skip, ({  in iov_iter_fault_in_readable()