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Message-ID: <20250507145456.121186494@goodmis.org>
Date: Wed, 07 May 2025 10:53:08 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Tom Zanussi <zanussi@...nel.org>
Subject: [PATCH 3/3] tracing: Remove unnecessary "goto out" that simply returns ret is
trigger code
From: Steven Rostedt <rostedt@...dmis.org>
There's several functions that have "goto out;" where the label out is just:
out:
return ret;
Simplify the code by just doing the return in the location and removing
all the out labels and jumps.
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
kernel/trace/trace_events_trigger.c | 44 +++++++++++------------------
1 file changed, 17 insertions(+), 27 deletions(-)
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index c316badc608b..fdd1112388e9 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -552,16 +552,14 @@ static int register_trigger(char *glob,
lockdep_assert_held(&event_mutex);
list_for_each_entry(test, &file->triggers, list) {
- if (test->cmd_ops->trigger_type == data->cmd_ops->trigger_type) {
- ret = -EEXIST;
- goto out;
- }
+ if (test->cmd_ops->trigger_type == data->cmd_ops->trigger_type)
+ return -EEXIST;
}
if (data->ops->init) {
ret = data->ops->init(data);
if (ret < 0)
- goto out;
+ return ret;
}
list_add_rcu(&data->list, &file->triggers);
@@ -572,7 +570,6 @@ static int register_trigger(char *glob,
list_del_rcu(&data->list);
update_cond_flag(file);
}
-out:
return ret;
}
@@ -770,7 +767,7 @@ int event_trigger_separate_filter(char *param_and_filter, char **param,
if (!param_and_filter) {
if (param_required)
ret = -EINVAL;
- goto out;
+ return ret;
}
/*
@@ -781,7 +778,7 @@ int event_trigger_separate_filter(char *param_and_filter, char **param,
*/
if (!param_required && param_and_filter && !isdigit(param_and_filter[0])) {
*filter = param_and_filter;
- goto out;
+ return ret;
}
/*
@@ -799,7 +796,6 @@ int event_trigger_separate_filter(char *param_and_filter, char **param,
if (!**filter)
*filter = NULL;
}
-out:
return ret;
}
@@ -991,13 +987,12 @@ event_trigger_parse(struct event_command *cmd_ops,
ret = -ENOMEM;
trigger_data = trigger_data_alloc(cmd_ops, cmd, param, file);
if (!trigger_data)
- goto out;
+ return ret;
if (remove) {
event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
trigger_data_free(trigger_data);
- ret = 0;
- goto out;
+ return 0;
}
ret = event_trigger_parse_num(param, trigger_data);
@@ -1017,13 +1012,12 @@ event_trigger_parse(struct event_command *cmd_ops,
/* Down the counter of trigger_data or free it if not used anymore */
event_trigger_free(trigger_data);
- out:
return ret;
out_free:
event_trigger_reset_filter(cmd_ops, trigger_data);
trigger_data_free(trigger_data);
- goto out;
+ return ret;
}
/**
@@ -1057,10 +1051,10 @@ int set_trigger_filter(char *filter_str,
s = strsep(&filter_str, " \t");
if (!strlen(s) || strcmp(s, "if") != 0)
- goto out;
+ return ret;
if (!filter_str)
- goto out;
+ return ret;
/* The filter is for the 'trigger' event, not the triggered event */
ret = create_event_filter(file->tr, file->event_call,
@@ -1104,7 +1098,6 @@ int set_trigger_filter(char *filter_str,
ret = -ENOMEM;
}
}
- out:
return ret;
}
@@ -1772,7 +1765,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
ret = -EINVAL;
event_enable_file = find_event_file(tr, system, event);
if (!event_enable_file)
- goto out;
+ return ret;
#ifdef CONFIG_HIST_TRIGGERS
hist = ((strcmp(cmd, ENABLE_HIST_STR) == 0) ||
@@ -1787,7 +1780,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
enable_data = kzalloc(sizeof(*enable_data), GFP_KERNEL);
if (!enable_data)
- goto out;
+ return ret;
enable_data->hist = hist;
enable_data->enable = enable;
@@ -1796,7 +1789,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
trigger_data = trigger_data_alloc(cmd_ops, cmd, param, enable_data);
if (!trigger_data) {
kfree(enable_data);
- goto out;
+ return ret;
}
if (remove) {
@@ -1804,7 +1797,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
kfree(trigger_data);
kfree(enable_data);
ret = 0;
- goto out;
+ return ret;
}
/* Up the trigger_data count to make sure nothing frees it on failure */
@@ -1834,7 +1827,6 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
goto out_disable;
event_trigger_free(trigger_data);
- out:
return ret;
out_disable:
trace_event_enable_disable(event_enable_file, 0, 1);
@@ -1845,7 +1837,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops,
event_trigger_free(trigger_data);
kfree(enable_data);
- goto out;
+ return ret;
}
int event_enable_register_trigger(char *glob,
@@ -1865,15 +1857,14 @@ int event_enable_register_trigger(char *glob,
(test->cmd_ops->trigger_type ==
data->cmd_ops->trigger_type) &&
(test_enable_data->file == enable_data->file)) {
- ret = -EEXIST;
- goto out;
+ return -EEXIST;
}
}
if (data->ops->init) {
ret = data->ops->init(data);
if (ret < 0)
- goto out;
+ return ret;
}
list_add_rcu(&data->list, &file->triggers);
@@ -1884,7 +1875,6 @@ int event_enable_register_trigger(char *glob,
list_del_rcu(&data->list);
update_cond_flag(file);
}
-out:
return ret;
}
--
2.47.2
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