1 files changed, 92 insertions, 0 deletions

diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
new file mode 100644
index 000000000000..f7a7b86f6eef
--- /dev/null
+++ b/include/linux/debugfs.h
@@ -0,0 +1,92 @@
+/*
+ *  debugfs.h - a tiny little debug file system
+ *
+ *  Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ *  Copyright (C) 2004 IBM Inc.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License version
+ *      2 as published by the Free Software Foundation.
+ *
+ *  debugfs is for people to use instead of /proc or /sys.
+ *  See Documentation/DocBook/kernel-api for more details.
+ */
+
+#ifndef _DEBUGFS_H_
+#define _DEBUGFS_H_
+
+#include <linux/fs.h>
+
+#if defined(CONFIG_DEBUG_FS)
+struct dentry *debugfs_create_file(const char *name, mode_t mode,
+                                   struct dentry *parent, void *data,
+                                   struct file_operations *fops);
+
+struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
+
+void debugfs_remove(struct dentry *dentry);
+
+struct dentry *debugfs_create_u8(const char *name, mode_t mode,
+                                 struct dentry *parent, u8 *value);
+struct dentry *debugfs_create_u16(const char *name, mode_t mode,
+                                  struct dentry *parent, u16 *value);
+struct dentry *debugfs_create_u32(const char *name, mode_t mode,
+                                  struct dentry *parent, u32 *value);
+struct dentry *debugfs_create_bool(const char *name, mode_t mode,
+                                  struct dentry *parent, u32 *value);
+
+#else
+/* 
+ * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
+ * so users have a chance to detect if there was a real error or not.  We don't
+ * want to duplicate the design decision mistakes of procfs and devfs again.
+ */
+
+static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
+                                                 struct dentry *parent,
+                                                 void *data,
+                                                 struct file_operations *fops)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline struct dentry *debugfs_create_dir(const char *name,
+                                                struct dentry *parent)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline void debugfs_remove(struct dentry *dentry)
+{ }
+
+static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
+                                               struct dentry *parent,
+                                               u8 *value)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
+                                                struct dentry *parent,
+                                                u8 *value)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
+                                                struct dentry *parent,
+                                                u8 *value)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
+                                                 struct dentry *parent,
+                                                 u8 *value)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+#endif
+
+#endif