debugfs: function to know if debugfs is initialized

[mv-sheeva.git] / fs / debugfs / inode.c

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 81ae9ea3c6e1c34e645e4d2541066ddb1f33a9ad..0662ba6de85a46040ac83b87d66562146a009811 100644 (file)
--- a/fs/debugfs/inode.c
+++ b/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 @@ exit:
 }
 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);