59 #define __bvec_iter_bvec(bvec, iter)	(&(bvec)[(iter).bi_idx])  argument
62 #define mp_bvec_iter_page(bvec, iter)				\  argument
63 	(__bvec_iter_bvec((bvec), (iter))->bv_page)
65 #define mp_bvec_iter_len(bvec, iter)				\  argument
66 	min((iter).bi_size,					\
67 	    __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done)
69 #define mp_bvec_iter_offset(bvec, iter)				\  argument
70 	(__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done)
72 #define mp_bvec_iter_page_idx(bvec, iter)			\  argument
73 	(mp_bvec_iter_offset((bvec), (iter)) / PAGE_SIZE)
75 #define mp_bvec_iter_bvec(bvec, iter)				\  argument
77 	.bv_page	= mp_bvec_iter_page((bvec), (iter)),	\
78 	.bv_len		= mp_bvec_iter_len((bvec), (iter)),	\
79 	.bv_offset	= mp_bvec_iter_offset((bvec), (iter)),	\
83  #define bvec_iter_offset(bvec, iter)				\  argument
84 	(mp_bvec_iter_offset((bvec), (iter)) % PAGE_SIZE)
86 #define bvec_iter_len(bvec, iter)				\  argument
87 	min_t(unsigned, mp_bvec_iter_len((bvec), (iter)),		\
88 	      PAGE_SIZE - bvec_iter_offset((bvec), (iter)))
90 #define bvec_iter_page(bvec, iter)				\  argument
91 	(mp_bvec_iter_page((bvec), (iter)) +			\
92 	 mp_bvec_iter_page_idx((bvec), (iter)))
94 #define bvec_iter_bvec(bvec, iter)				\  argument
96 	.bv_page	= bvec_iter_page((bvec), (iter)),	\
97 	.bv_len		= bvec_iter_len((bvec), (iter)),	\
98 	.bv_offset	= bvec_iter_offset((bvec), (iter)),	\
102 		struct bvec_iter *iter, unsigned bytes)  in bvec_iter_advance()  argument
104 	unsigned int idx = iter->bi_idx;  in bvec_iter_advance()
106 	if (WARN_ONCE(bytes > iter->bi_size,  in bvec_iter_advance()
108 		iter->bi_size = 0;  in bvec_iter_advance()
112 	iter->bi_size -= bytes;  in bvec_iter_advance()
113 	bytes += iter->bi_bvec_done;  in bvec_iter_advance()
120 	iter->bi_idx = idx;  in bvec_iter_advance()
121 	iter->bi_bvec_done = bytes;  in bvec_iter_advance()
130 				struct bvec_iter *iter, unsigned int bytes)  in bvec_iter_advance_single()  argument
132 	unsigned int done = iter->bi_bvec_done + bytes;  in bvec_iter_advance_single()
134 	if (done == bv[iter->bi_idx].bv_len) {  in bvec_iter_advance_single()
136 		iter->bi_idx++;  in bvec_iter_advance_single()
138 	iter->bi_bvec_done = done;  in bvec_iter_advance_single()
139 	iter->bi_size -= bytes;  in bvec_iter_advance_single()
142 #define for_each_bvec(bvl, bio_vec, iter, start)			\  argument
143 	for (iter = (start);						\
144 	     (iter).bi_size &&						\
145 		((bvl = bvec_iter_bvec((bio_vec), (iter))), 1);	\
146 	     bvec_iter_advance_single((bio_vec), &(iter), (bvl).bv_len))