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/linux-4.4.14/block/
Dbio.c946 struct bio_vec src_bv, dst_bv; in bio_copy_data() local
971 dst_bv = bio_iter_iovec(dst, dst_iter); in bio_copy_data()
973 bytes = min(src_bv.bv_len, dst_bv.bv_len); in bio_copy_data()
976 dst_p = kmap_atomic(dst_bv.bv_page); in bio_copy_data()
978 memcpy(dst_p + dst_bv.bv_offset, in bio_copy_data()