BLK_IO_TRACE_MAGIC 95 kernel/trace/blktrace.c t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION; BLK_IO_TRACE_MAGIC 276 kernel/trace/blktrace.c t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION; BLK_IO_TRACE_MAGIC 1549 kernel/trace/blktrace.c .magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION,