98 #define __bvec_iter_bvec(bvec, iter)	(&(bvec)[(iter).bi_idx])  argument
101 #define mp_bvec_iter_page(bvec, iter)				\  argument
102 	(__bvec_iter_bvec((bvec), (iter))->bv_page)
104 #define mp_bvec_iter_len(bvec, iter)				\  argument
105 	min((iter).bi_size,					\
106 	    __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done)
108 #define mp_bvec_iter_offset(bvec, iter)				\  argument
109 	(__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done)
111 #define mp_bvec_iter_page_idx(bvec, iter)			\  argument
112 	(mp_bvec_iter_offset((bvec), (iter)) / PAGE_SIZE)
114 #define mp_bvec_iter_bvec(bvec, iter)				\  argument
116 	.bv_page	= mp_bvec_iter_page((bvec), (iter)),	\
117 	.bv_len		= mp_bvec_iter_len((bvec), (iter)),	\
118 	.bv_offset	= mp_bvec_iter_offset((bvec), (iter)),	\
122  #define bvec_iter_offset(bvec, iter)				\  argument
123 	(mp_bvec_iter_offset((bvec), (iter)) % PAGE_SIZE)
125 #define bvec_iter_len(bvec, iter)				\  argument
126 	min_t(unsigned, mp_bvec_iter_len((bvec), (iter)),		\
127 	      PAGE_SIZE - bvec_iter_offset((bvec), (iter)))
129 #define bvec_iter_page(bvec, iter)				\  argument
130 	(mp_bvec_iter_page((bvec), (iter)) +			\
131 	 mp_bvec_iter_page_idx((bvec), (iter)))
133 #define bvec_iter_bvec(bvec, iter)				\  argument
135 	.bv_page	= bvec_iter_page((bvec), (iter)),	\
136 	.bv_len		= bvec_iter_len((bvec), (iter)),	\
137 	.bv_offset	= bvec_iter_offset((bvec), (iter)),	\
141 		struct bvec_iter *iter, unsigned bytes)  in bvec_iter_advance()  argument
143 	unsigned int idx = iter->bi_idx;  in bvec_iter_advance()
145 	if (WARN_ONCE(bytes > iter->bi_size,  in bvec_iter_advance()
147 		iter->bi_size = 0;  in bvec_iter_advance()
151 	iter->bi_size -= bytes;  in bvec_iter_advance()
152 	bytes += iter->bi_bvec_done;  in bvec_iter_advance()
159 	iter->bi_idx = idx;  in bvec_iter_advance()
160 	iter->bi_bvec_done = bytes;  in bvec_iter_advance()
169 				struct bvec_iter *iter, unsigned int bytes)  in bvec_iter_advance_single()  argument
171 	unsigned int done = iter->bi_bvec_done + bytes;  in bvec_iter_advance_single()
173 	if (done == bv[iter->bi_idx].bv_len) {  in bvec_iter_advance_single()
175 		iter->bi_idx++;  in bvec_iter_advance_single()
177 	iter->bi_bvec_done = done;  in bvec_iter_advance_single()
178 	iter->bi_size -= bytes;  in bvec_iter_advance_single()
181 #define for_each_bvec(bvl, bio_vec, iter, start)			\  argument
182 	for (iter = (start);						\
183 	     (iter).bi_size &&						\
184 		((bvl = bvec_iter_bvec((bio_vec), (iter))), 1);	\
185 	     bvec_iter_advance_single((bio_vec), &(iter), (bvl).bv_len))