---

yaml --- r: 146055 b: refs/heads/master c: 89ec0de h: refs/heads/master i: 146053: de370eb 146051: 426758c 146047: f3b31ea v: v3
git-mirror · Apr 24, 2009 · 72b218b · 72b218b
1 parent 3efa2f2
commit 72b218b
Show file tree

Hide file tree

Showing 4 changed files with 8 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9be24414aad047dcf9d8d2a9a929321536c7ebec
+refs/heads/master: 89ec0dee9eba6275d47be0b878cf5f6d5c2fb6eb
diff --git a/trunk/include/linux/ftrace_event.h b/trunk/include/linux/ftrace_event.h
@@ -16,13 +16,16 @@ struct dentry;
  *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
  */
 struct trace_entry {
-	int			type;
+	unsigned short		type;
 	unsigned char		flags;
 	unsigned char		preempt_count;
 	int			pid;
 	int			tgid;
 };
 
+#define FTRACE_MAX_EVENT						\
+	((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
+
 /*
  * Trace iterator - used by printout routines who present trace
  * results to users and which routines might sleep, etc:

diff --git a/trunk/kernel/trace/trace_events.c b/trunk/kernel/trace/trace_events.c
@@ -398,7 +398,7 @@ static int trace_write_header(struct trace_seq *s)
 				"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
 				"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
 				"\n",
-				FIELD(int, type),
+				FIELD(unsigned short, type),
 				FIELD(unsigned char, flags),
 				FIELD(unsigned char, preempt_count),
 				FIELD(int, pid),

diff --git a/trunk/kernel/trace/trace_output.c b/trunk/kernel/trace/trace_output.c
@@ -537,6 +537,8 @@ int register_ftrace_event(struct trace_event *event)
  out:
 	mutex_unlock(&trace_event_mutex);
 
+	WARN_ON_ONCE(next_event_type > FTRACE_MAX_EVENT);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(register_ftrace_event);