BLK_MQ_F_ALLOC_POLICY_BITS 244 include/linux/blk-mq.h ((1 << BLK_MQ_F_ALLOC_POLICY_BITS) - 1)) BLK_MQ_F_ALLOC_POLICY_BITS 246 include/linux/blk-mq.h ((policy & ((1 << BLK_MQ_F_ALLOC_POLICY_BITS) - 1)) \