linux-kernel - [PATCH v2] media:v4l2-async:add debugfs under CONFIG_DEBUG

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Message-Id: <20260121031456.1125096-1-luo.liu.linux@163.com>
Date: Wed, 21 Jan 2026 11:14:56 +0800
From: "luo.liu" <luo.liu.linux@....com>
To: sakari.ailus@...ux.intel.com,
	mchehab@...nel.org
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	luo.liu.linux@....com
Subject: [PATCH v2] media:v4l2-async:add debugfs under CONFIG_DEBUG_FS

All debugfs-related code is guarded by CONFIG_DEBUG_FS to avoid
bloating the kernel when debugfs is disabled.

Signed-off-by: luo.liu <luo.liu.linux@....com>
---
 drivers/media/v4l2-core/v4l2-async.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 1c08bba9ecb9..f6a1a57149ba 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -947,6 +947,7 @@ v4l2_async_nf_name(struct v4l2_async_notifier *notifier)
 		return "nil";
 }
 
+#ifdef CONFIG_DEBUG_FS
 static int pending_subdevs_show(struct seq_file *s, void *data)
 {
 	struct v4l2_async_notifier *notif;
@@ -967,20 +968,25 @@ static int pending_subdevs_show(struct seq_file *s, void *data)
 DEFINE_SHOW_ATTRIBUTE(pending_subdevs);
 
 static struct dentry *v4l2_async_debugfs_dir;
+#endif
 
 static int __init v4l2_async_init(void)
 {
+#ifdef CONFIG_DEBUG_FS
 	v4l2_async_debugfs_dir = debugfs_create_dir("v4l2-async", NULL);
 	debugfs_create_file("pending_async_subdevices", 0444,
 			    v4l2_async_debugfs_dir, NULL,
 			    &pending_subdevs_fops);
 
+#endif
 	return 0;
 }
 
 static void __exit v4l2_async_exit(void)
 {
+#ifdef CONFIG_DEBUG_FS
 	debugfs_remove_recursive(v4l2_async_debugfs_dir);
+#endif
 }
 
 subsys_initcall(v4l2_async_init);

base-commit: d08c85ac8894995d4b0d8fb48d2f6a3e53cd79ab
-- 
2.25.1