blk_add_trace_rq_insert 1118 kernel/trace/blktrace.c ret = register_trace_block_rq_insert(blk_add_trace_rq_insert, NULL); blk_add_trace_rq_insert 1169 kernel/trace/blktrace.c unregister_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);