blk_add_trace_rq_remap 1148 kernel/trace/blktrace.c 	ret = register_trace_block_rq_remap(blk_add_trace_rq_remap, NULL);
blk_add_trace_rq_remap 1154 kernel/trace/blktrace.c 	unregister_trace_block_rq_remap(blk_add_trace_rq_remap, NULL);