bvec_iter_offset 37 include/linux/bio.h bvec_iter_offset((bio)->bi_io_vec, (iter)) bvec_iter_offset 74 include/linux/bvec.h PAGE_SIZE - bvec_iter_offset((bvec), (iter))) bvec_iter_offset 84 include/linux/bvec.h .bv_offset = bvec_iter_offset((bvec), (iter)), \