linux-kernel - [PATCH 7/7] tracing/events: Only define remove_subsystem_dir() if CONFIG

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Date:	Thu,  6 Aug 2009 08:27:38 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 7/7] tracing/events: Only define remove_subsystem_dir() if CONFIG_MODULES

If we disable modules, we get the following warning in ftrace events
file:

kernel/trace/trace_events.c:912: attention : ‘remove_subsystem_dir’ defined but not used

remove_subystem_dir() is useless if !CONFIG_MODULES, then move it to
the appropriate #ifdef section of trace_events.c

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
---
 kernel/trace/trace_events.c |   52 +++++++++++++++++++++---------------------
 1 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 90cf936..70ecb76 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -908,32 +908,6 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
 	return system->entry;
 }
 
-static void remove_subsystem_dir(const char *name)
-{
-	struct event_subsystem *system;
-
-	if (strcmp(name, TRACE_SYSTEM) == 0)
-		return;
-
-	list_for_each_entry(system, &event_subsystems, list) {
-		if (strcmp(system->name, name) == 0) {
-			if (!--system->nr_events) {
-				struct event_filter *filter = system->filter;
-
-				debugfs_remove_recursive(system->entry);
-				list_del(&system->list);
-				if (filter) {
-					kfree(filter->filter_string);
-					kfree(filter);
-				}
-				kfree(system->name);
-				kfree(system);
-			}
-			break;
-		}
-	}
-}
-
 static int
 event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
 		 const struct file_operations *id,
@@ -1018,6 +992,32 @@ struct ftrace_module_file_ops {
 	struct file_operations		filter;
 };
 
+static void remove_subsystem_dir(const char *name)
+{
+	struct event_subsystem *system;
+
+	if (strcmp(name, TRACE_SYSTEM) == 0)
+		return;
+
+	list_for_each_entry(system, &event_subsystems, list) {
+		if (strcmp(system->name, name) == 0) {
+			if (!--system->nr_events) {
+				struct event_filter *filter = system->filter;
+
+				debugfs_remove_recursive(system->entry);
+				list_del(&system->list);
+				if (filter) {
+					kfree(filter->filter_string);
+					kfree(filter);
+				}
+				kfree(system->name);
+				kfree(system);
+			}
+			break;
+		}
+	}
+}
+
 static struct ftrace_module_file_ops *
 trace_create_file_ops(struct module *mod)
 {
-- 
1.6.2.3

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