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-rw-r--r--samples/trace_events/trace-events-sample.h19
1 files changed, 10 insertions, 9 deletions
diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h
index 500981eca7..55f9a3da92 100644
--- a/samples/trace_events/trace-events-sample.h
+++ b/samples/trace_events/trace-events-sample.h
@@ -136,10 +136,11 @@
*
* To assign a string, use the helper macro __assign_str().
*
- * __assign_str(foo, bar);
+ * __assign_str(foo);
*
- * In most cases, the __assign_str() macro will take the same
- * parameters as the __string() macro had to declare the string.
+ * The __string() macro saves off the string that is passed into
+ * the second parameter, and the __assign_str() will store than
+ * saved string into the "foo" field.
*
* __vstring: This is similar to __string() but instead of taking a
* dynamic length, it takes a variable list va_list 'va' variable.
@@ -177,7 +178,7 @@
* The length is saved via the __string_len() and is retrieved in
* __assign_str().
*
- * __assign_str(foo, bar);
+ * __assign_str(foo);
*
* Then len + 1 is allocated to the ring buffer, and a nul terminating
* byte is added. This is similar to:
@@ -311,8 +312,8 @@ TRACE_EVENT(foo_bar,
__entry->bar = bar;
memcpy(__get_dynamic_array(list), lst,
__length_of(lst) * sizeof(int));
- __assign_str(str, string);
- __assign_str(lstr, foo);
+ __assign_str(str);
+ __assign_str(lstr);
__assign_vstr(vstr, fmt, va);
__assign_bitmask(cpus, cpumask_bits(mask), num_possible_cpus());
__assign_cpumask(cpum, cpumask_bits(mask));
@@ -418,7 +419,7 @@ TRACE_EVENT_CONDITION(foo_bar_with_cond,
),
TP_fast_assign(
- __assign_str(foo, foo);
+ __assign_str(foo);
__entry->bar = bar;
),
@@ -459,7 +460,7 @@ TRACE_EVENT_FN(foo_bar_with_fn,
),
TP_fast_assign(
- __assign_str(foo, foo);
+ __assign_str(foo);
__entry->bar = bar;
),
@@ -506,7 +507,7 @@ DECLARE_EVENT_CLASS(foo_template,
),
TP_fast_assign(
- __assign_str(foo, foo);
+ __assign_str(foo);
__entry->bar = bar;
),