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Message-ID: <6b2a618815b45ac4ac09976ef4fb0bd3635c143d.1763306824.git.namcao@linutronix.de>
Date: Sun, 16 Nov 2025 15:35:12 +0000
From: Nam Cao <namcao@...utronix.de>
To: Gabriele Monaco <gmonaco@...hat.com>,
Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
linux-trace-kernel@...r.kernel.org,
linux-kernel@...r.kernel.org,
Nam Cao <namcao@...utronix.de>
Subject: [PATCH 2/2] rv: Convert to use __free
Convert to use __free to tidy up the code.
Signed-off-by: Nam Cao <namcao@...utronix.de>
---
kernel/trace/rv/rv.c | 65 +++++++++++++++--------------------
kernel/trace/rv/rv.h | 6 ++--
kernel/trace/rv/rv_reactors.c | 32 ++++++++---------
3 files changed, 46 insertions(+), 57 deletions(-)
diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
index b1059a3cf4fa..e83dc9f0c7bb 100644
--- a/kernel/trace/rv/rv.c
+++ b/kernel/trace/rv/rv.c
@@ -420,35 +420,28 @@ static const struct file_operations interface_desc_fops = {
static int create_monitor_dir(struct rv_monitor *mon, struct rv_monitor *parent)
{
struct dentry *root = parent ? parent->root_d : get_monitors_root();
- const char *name = mon->name;
+ struct dentry *dir __free(rv_remove) = rv_create_dir(mon->name, root);
struct dentry *tmp;
int retval;
- mon->root_d = rv_create_dir(name, root);
- if (!mon->root_d)
+ if (!dir)
return -ENOMEM;
- tmp = rv_create_file("enable", RV_MODE_WRITE, mon->root_d, mon, &interface_enable_fops);
- if (!tmp) {
- retval = -ENOMEM;
- goto out_remove_root;
- }
+ tmp = rv_create_file("enable", RV_MODE_WRITE, dir, mon, &interface_enable_fops);
+ if (!tmp)
+ return -ENOMEM;
- tmp = rv_create_file("desc", RV_MODE_READ, mon->root_d, mon, &interface_desc_fops);
- if (!tmp) {
- retval = -ENOMEM;
- goto out_remove_root;
- }
+ tmp = rv_create_file("desc", RV_MODE_READ, dir, mon, &interface_desc_fops);
+ if (!tmp)
+ return -ENOMEM;
- retval = reactor_populate_monitor(mon);
+ retval = reactor_populate_monitor(mon, dir);
if (retval)
- goto out_remove_root;
+ return retval;
+ mon->root_d = dir;
+ retain_and_null_ptr(dir);
return 0;
-
-out_remove_root:
- rv_remove(mon->root_d);
- return retval;
}
/*
@@ -827,39 +820,37 @@ int __init rv_init_interface(void)
{
struct dentry *tmp;
int retval;
+ struct dentry *root_dir __free(rv_remove) = rv_create_dir("rv", NULL);
- rv_root.root_dir = rv_create_dir("rv", NULL);
- if (!rv_root.root_dir)
- goto out_err;
+ if (!root_dir)
+ return 1;
- rv_root.monitors_dir = rv_create_dir("monitors", rv_root.root_dir);
+ rv_root.monitors_dir = rv_create_dir("monitors", root_dir);
if (!rv_root.monitors_dir)
- goto out_err;
+ return 1;
- tmp = rv_create_file("available_monitors", RV_MODE_READ, rv_root.root_dir, NULL,
+ tmp = rv_create_file("available_monitors", RV_MODE_READ, root_dir, NULL,
&available_monitors_ops);
if (!tmp)
- goto out_err;
+ return 1;
- tmp = rv_create_file("enabled_monitors", RV_MODE_WRITE, rv_root.root_dir, NULL,
+ tmp = rv_create_file("enabled_monitors", RV_MODE_WRITE, root_dir, NULL,
&enabled_monitors_ops);
if (!tmp)
- goto out_err;
+ return 1;
- tmp = rv_create_file("monitoring_on", RV_MODE_WRITE, rv_root.root_dir, NULL,
+ tmp = rv_create_file("monitoring_on", RV_MODE_WRITE, root_dir, NULL,
&monitoring_on_fops);
if (!tmp)
- goto out_err;
- retval = init_rv_reactors(rv_root.root_dir);
+ return 1;
+ retval = init_rv_reactors(root_dir);
if (retval)
- goto out_err;
+ return 1;
turn_monitoring_on();
- return 0;
+ rv_root.root_dir = root_dir;
+ retain_and_null_ptr(root_dir);
-out_err:
- rv_remove(rv_root.root_dir);
- printk(KERN_ERR "RV: Error while creating the RV interface\n");
- return 1;
+ return 0;
}
diff --git a/kernel/trace/rv/rv.h b/kernel/trace/rv/rv.h
index 1485a70c1bf4..8661d1b6ede4 100644
--- a/kernel/trace/rv/rv.h
+++ b/kernel/trace/rv/rv.h
@@ -17,6 +17,8 @@ struct rv_interface {
#define rv_create_file tracefs_create_file
#define rv_remove tracefs_remove
+DEFINE_FREE(rv_remove, struct dentry *, rv_remove(_T));
+
#define MAX_RV_MONITOR_NAME_SIZE 32
#define MAX_RV_REACTOR_NAME_SIZE 32
@@ -30,10 +32,10 @@ bool rv_is_container_monitor(struct rv_monitor *mon);
bool rv_is_nested_monitor(struct rv_monitor *mon);
#ifdef CONFIG_RV_REACTORS
-int reactor_populate_monitor(struct rv_monitor *mon);
+int reactor_populate_monitor(struct rv_monitor *mon, struct dentry *root);
int init_rv_reactors(struct dentry *root_dir);
#else
-static inline int reactor_populate_monitor(struct rv_monitor *mon)
+static inline int reactor_populate_monitor(struct rv_monitor *mon, struct dentry *root)
{
return 0;
}
diff --git a/kernel/trace/rv/rv_reactors.c b/kernel/trace/rv/rv_reactors.c
index 37d1d37a27a3..ce7d22cbde57 100644
--- a/kernel/trace/rv/rv_reactors.c
+++ b/kernel/trace/rv/rv_reactors.c
@@ -404,14 +404,15 @@ static const struct file_operations reacting_on_fops = {
/**
* reactor_populate_monitor - creates per monitor reactors file
* @mon: The monitor.
+ * @root: The directory of the monitor.
*
* Returns 0 if successful, error otherwise.
*/
-int reactor_populate_monitor(struct rv_monitor *mon)
+int reactor_populate_monitor(struct rv_monitor *mon, struct dentry *root)
{
struct dentry *tmp;
- tmp = rv_create_file("reactors", RV_MODE_WRITE, mon->root_d, mon, &monitor_reactors_ops);
+ tmp = rv_create_file("reactors", RV_MODE_WRITE, root, mon, &monitor_reactors_ops);
if (!tmp)
return -ENOMEM;
@@ -438,30 +439,25 @@ static struct rv_reactor rv_nop = {
int init_rv_reactors(struct dentry *root_dir)
{
- struct dentry *available, *reacting;
int retval;
- available = rv_create_file("available_reactors", RV_MODE_READ, root_dir, NULL,
- &available_reactors_ops);
- if (!available)
- goto out_err;
+ struct dentry *available __free(rv_remove) =
+ rv_create_file("available_reactors", RV_MODE_READ, root_dir,
+ NULL, &available_reactors_ops);
- reacting = rv_create_file("reacting_on", RV_MODE_WRITE, root_dir, NULL, &reacting_on_fops);
- if (!reacting)
- goto rm_available;
+ struct dentry *reacting =
+ rv_create_file("reacting_on", RV_MODE_WRITE, root_dir, NULL, &reacting_on_fops);
+
+ if (!reacting || !available)
+ return -ENOMEM;
retval = __rv_register_reactor(&rv_nop);
if (retval)
- goto rm_reacting;
+ return retval;
turn_reacting_on();
+ retain_and_null_ptr(available);
+ retain_and_null_ptr(reacting);
return 0;
-
-rm_reacting:
- rv_remove(reacting);
-rm_available:
- rv_remove(available);
-out_err:
- return -ENOMEM;
}
--
2.51.0
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