diff options
Diffstat (limited to 'include/linux/bvec.h')
-rw-r--r-- | include/linux/bvec.h | 52 |
1 files changed, 4 insertions, 48 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h index a11373db..5bc68b42 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -43,6 +43,10 @@ struct bvec_iter { current bvec */ }; +struct bvec_iter_all { + int idx; +}; + /* * various member access, note that bio_data should of course not be used * on highmem page vectors @@ -94,52 +98,4 @@ static inline void bvec_iter_advance(const struct bio_vec *bv, ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) -/* - * bvec_iter_all: for advancing over individual pages in a bio, as it was when - * it was first created: - */ -struct bvec_iter_all { - int idx; - unsigned done; -}; - -static inline void bvec_iter_all_init(struct bvec_iter_all *iter_all) -{ - iter_all->done = 0; - iter_all->idx = 0; -} - -static inline struct bio_vec __bvec_iter_all_peek(const struct bio_vec *bvec, - const struct bvec_iter_all *iter) -{ - struct bio_vec bv = bvec[iter->idx]; - - BUG_ON(iter->done >= bv.bv_len); - - bv.bv_offset += iter->done; - bv.bv_len -= iter->done; - return bv; -} - -static inline struct bio_vec bvec_iter_all_peek(const struct bio_vec *bvec, - const struct bvec_iter_all *iter) -{ - struct bio_vec bv = __bvec_iter_all_peek(bvec, iter); - - bv.bv_len = min_t(unsigned, PAGE_SIZE - bv.bv_offset, bv.bv_len); - return bv; -} - -static inline void bvec_iter_all_advance(const struct bio_vec *bvec, - struct bvec_iter_all *iter, - unsigned bytes) -{ - iter->done += bytes; - - while (iter->done && iter->done >= bvec[iter->idx].bv_len) { - iter->done -= bvec[iter->idx].bv_len; - iter->idx++; - } -} - #endif /* __LINUX_BVEC_ITER_H */ |