+#define BIO_OP_SHIFT (8 * sizeof(unsigned int) - REQ_OP_BITS)
+#define bio_op(bio) ((bio)->bi_rw >> BIO_OP_SHIFT)
+
+#define bio_set_op_attrs(bio, op, op_flags) do { \
+ WARN_ON(op >= (1 << REQ_OP_BITS)); \
+ (bio)->bi_rw &= ((1 << BIO_OP_SHIFT) - 1); \
+ (bio)->bi_rw |= ((unsigned int) (op) << BIO_OP_SHIFT); \
+ (bio)->bi_rw |= op_flags; \
+} while (0)
+