[for-next][PATCH 16/21] irq/tracing: Export enums in tracepoints to user space

From: Steven Rostedt
Date: Wed Apr 08 2015 - 09:53:15 EST


From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>

The enums used by the softirq mapping is what is shown in the output
of the __print_symbolic() and not their values, that are needed
to map them to their strings. Export them to userspace with the
TRACE_DEFINE_ENUM() macro so that user space tools can map the enums
with their values.

Link: http://lkml.kernel.org/r/20150403013802.220157513@xxxxxxxxxxx

Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
include/trace/events/irq.h | 39 +++++++++++++++++++++++++++------------
1 file changed, 27 insertions(+), 12 deletions(-)

diff --git a/include/trace/events/irq.h b/include/trace/events/irq.h
index 3608bebd3d9c..ff8f6c091a15 100644
--- a/include/trace/events/irq.h
+++ b/include/trace/events/irq.h
@@ -9,19 +9,34 @@
struct irqaction;
struct softirq_action;

-#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
+#define SOFTIRQ_NAME_LIST \
+ softirq_name(HI) \
+ softirq_name(TIMER) \
+ softirq_name(NET_TX) \
+ softirq_name(NET_RX) \
+ softirq_name(BLOCK) \
+ softirq_name(BLOCK_IOPOLL) \
+ softirq_name(TASKLET) \
+ softirq_name(SCHED) \
+ softirq_name(HRTIMER) \
+ softirq_name_end(RCU)
+
+#undef softirq_name
+#undef softirq_name_end
+
+#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
+#define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
+
+SOFTIRQ_NAME_LIST
+
+#undef softirq_name
+#undef softirq_name_end
+
+#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
+#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
+
#define show_softirq_name(val) \
- __print_symbolic(val, \
- softirq_name(HI), \
- softirq_name(TIMER), \
- softirq_name(NET_TX), \
- softirq_name(NET_RX), \
- softirq_name(BLOCK), \
- softirq_name(BLOCK_IOPOLL), \
- softirq_name(TASKLET), \
- softirq_name(SCHED), \
- softirq_name(HRTIMER), \
- softirq_name(RCU))
+ __print_symbolic(val, SOFTIRQ_NAME_LIST)

/**
* irq_handler_entry - called immediately before the irq action handler
--
2.1.4


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