linux-kernel - [PATCH] tracing: Have synthetic event test use raw_smp_processor

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Date:   Thu, 20 Feb 2020 16:29:50 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Tom Zanussi <zanussi@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: [PATCH] tracing: Have synthetic event test use
 raw_smp_processor_id()


From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

The test code that tests synthetic event creation pushes in as one of its
test fields the current CPU using "smp_processor_id()". As this is just
something to see if the value is correctly passed in, and the actual CPU
used does not matter, use raw_smp_processor_id(), otherwise with debug
preemption enabled, a warning happens as the smp_processor_id() is called
without preemption enabled.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 kernel/trace/synth_event_gen_test.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/trace/synth_event_gen_test.c b/kernel/trace/synth_event_gen_test.c
index 6866280a9b10..7d56d621ffea 100644
--- a/kernel/trace/synth_event_gen_test.c
+++ b/kernel/trace/synth_event_gen_test.c
@@ -114,7 +114,7 @@ static int __init test_gen_synth_cmd(void)
 	vals[1] = (u64)(long)"hula hoops";	/* next_comm_field */
 	vals[2] = 1000000;		/* ts_ns */
 	vals[3] = 1000;			/* ts_ms */
-	vals[4] = smp_processor_id();	/* cpu */
+	vals[4] = raw_smp_processor_id(); /* cpu */
 	vals[5] = (u64)(long)"thneed";	/* my_string_field */
 	vals[6] = 598;			/* my_int_field */
 
@@ -221,7 +221,7 @@ static int __init test_empty_synth_event(void)
 	vals[1] = (u64)(long)"tiddlywinks";	/* next_comm_field */
 	vals[2] = 1000000;		/* ts_ns */
 	vals[3] = 1000;			/* ts_ms */
-	vals[4] = smp_processor_id();	/* cpu */
+	vals[4] = raw_smp_processor_id(); /* cpu */
 	vals[5] = (u64)(long)"thneed_2.0";	/* my_string_field */
 	vals[6] = 399;			/* my_int_field */
 
@@ -293,7 +293,7 @@ static int __init test_create_synth_event(void)
 	vals[1] = (u64)(long)"tiddlywinks";	/* next_comm_field */
 	vals[2] = 1000000;		/* ts_ns */
 	vals[3] = 1000;			/* ts_ms */
-	vals[4] = smp_processor_id();	/* cpu */
+	vals[4] = raw_smp_processor_id(); /* cpu */
 	vals[5] = (u64)(long)"thneed";	/* my_string_field */
 	vals[6] = 398;			/* my_int_field */
 
@@ -345,7 +345,7 @@ static int __init test_add_next_synth_val(void)
 		goto out;
 
 	/* cpu */
-	ret = synth_event_add_next_val(smp_processor_id(), &trace_state);
+	ret = synth_event_add_next_val(raw_smp_processor_id(), &trace_state);
 	if (ret)
 		goto out;
 
@@ -388,7 +388,7 @@ static int __init test_add_synth_val(void)
 	if (ret)
 		goto out;
 
-	ret = synth_event_add_val("cpu", smp_processor_id(), &trace_state);
+	ret = synth_event_add_val("cpu", raw_smp_processor_id(), &trace_state);
 	if (ret)
 		goto out;
 
@@ -427,7 +427,7 @@ static int __init test_trace_synth_event(void)
 				(u64)(long)"clackers",	/* next_comm_field */
 				(u64)1000000,		/* ts_ns */
 				(u64)1000,		/* ts_ms */
-				(u64)smp_processor_id(),/* cpu */
+				(u64)raw_smp_processor_id(), /* cpu */
 				(u64)(long)"Thneed",	/* my_string_field */
 				(u64)999);		/* my_int_field */
 	return ret;
-- 
2.20.1