REQ_FLAG_BITS    1792 block/blk-core.c 	BUILD_BUG_ON(REQ_OP_BITS + REQ_FLAG_BITS > 8 *
REQ_FLAG_BITS    1794 block/blk-core.c 	BUILD_BUG_ON(REQ_OP_BITS + REQ_FLAG_BITS > 8 *