BLK_TC_SHIFT
#define BLK_TC_ACT(act) ((u64)(act) << BLK_TC_SHIFT)
int tc = t->action >> BLK_TC_SHIFT;
what = (t->action & ((1 << BLK_TC_SHIFT) - 1)) & ~__BLK_TA_CGROUP;
if (((bt->act_mask << BLK_TC_SHIFT) & what) == 0)
(ilog2(BLK_TC_ ## __name) + BLK_TC_SHIFT - __REQ_ ## __name))
if (bt->version == 1 && (what >> BLK_TC_SHIFT) > BLK_TC_END_V1) {