From 0006c14e7c985a3e75600143cdb518c9fa36c3b0 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Sun, 22 Mar 2009 23:10:44 +0100
Subject: [PATCH] --- yaml --- r: 141027 b: refs/heads/master c:
 c0f92ba99bdeaf35f9c580291b4e1a657c67fbd4 h: refs/heads/master i:   141025:
 fbc3f34bc523ce94110ab1dc7f60b3177c768828   141023:
 ba49a648d1d72639a314033cd7294146739d6f6c v: v3

---
 [refs]                        |  2 +-
 trunk/fs/debugfs/inode.c      | 16 ++++++++++++++++
 trunk/include/linux/debugfs.h |  8 ++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 423a259d3d90..39b4f131fcc2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b8b94265337f83b7db9c5f429b1769d463d7da8c
+refs/heads/master: c0f92ba99bdeaf35f9c580291b4e1a657c67fbd4
diff --git a/trunk/fs/debugfs/inode.c b/trunk/fs/debugfs/inode.c
index 81ae9ea3c6e1..0662ba6de85a 100644
--- a/trunk/fs/debugfs/inode.c
+++ b/trunk/fs/debugfs/inode.c
@@ -30,6 +30,7 @@
 
 static struct vfsmount *debugfs_mount;
 static int debugfs_mount_count;
+static bool debugfs_registered;
 
 static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t dev)
 {
@@ -496,6 +497,16 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
 }
 EXPORT_SYMBOL_GPL(debugfs_rename);
 
+/**
+ * debugfs_initialized - Tells whether debugfs has been registered
+ */
+bool debugfs_initialized(void)
+{
+	return debugfs_registered;
+}
+EXPORT_SYMBOL_GPL(debugfs_initialized);
+
+
 static struct kobject *debug_kobj;
 
 static int __init debugfs_init(void)
@@ -509,11 +520,16 @@ static int __init debugfs_init(void)
 	retval = register_filesystem(&debug_fs_type);
 	if (retval)
 		kobject_put(debug_kobj);
+	else
+		debugfs_registered = true;
+
 	return retval;
 }
 
 static void __exit debugfs_exit(void)
 {
+	debugfs_registered = false;
+
 	simple_release_fs(&debugfs_mount, &debugfs_mount_count);
 	unregister_filesystem(&debug_fs_type);
 	kobject_put(debug_kobj);
diff --git a/trunk/include/linux/debugfs.h b/trunk/include/linux/debugfs.h
index af0e01d4c663..eb5c2ba2f81a 100644
--- a/trunk/include/linux/debugfs.h
+++ b/trunk/include/linux/debugfs.h
@@ -71,6 +71,9 @@ struct dentry *debugfs_create_bool(const char *name, mode_t mode,
 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
 				  struct dentry *parent,
 				  struct debugfs_blob_wrapper *blob);
+
+bool debugfs_initialized(void);
+
 #else
 
 #include <linux/err.h>
@@ -183,6 +186,11 @@ static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
 	return ERR_PTR(-ENODEV);
 }
 
+static inline bool debugfs_initialized(void)
+{
+	return false;
+}
+
 #endif
 
 #endif