blk_add_trace_bio_queue 1134 kernel/trace/blktrace.c 	ret = register_trace_block_bio_queue(blk_add_trace_bio_queue, NULL);
blk_add_trace_bio_queue 1161 kernel/trace/blktrace.c 	unregister_trace_block_bio_queue(blk_add_trace_bio_queue, NULL);