Re: [RFC][PATCH 1/3] tracing: Added hardware latency tracer

[Sebastian Andrzej Siewior]

* Steven Rostedt | 2016-08-04 10:57:09 [-0400]:

>diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
>new file mode 100644
>index 000000000000..08dfabe4e862
>--- /dev/null
>+++ b/kernel/trace/trace_hwlat.c
â
>+/* Macros to encapsulate the time capturing infrastructure */
>+#define time_type	u64
>+#define time_get()	trace_clock_local()
>+#define time_to_us(x)	div_u64(x, 1000)
>+#define time_sub(a, b)	((a) - (b))
>+#define init_time(a, b)	(a = b)
>+#define time_u64(a)	a

Do we need a macro for this? In the old code we could choose between
CONFIG_TRACING but now we don't.

Sebastian