debugfs: make debugfs_create_u32_array() return void

The single user of debugfs_create_u32_array() does not care about the
return value of it, so make it return void as there is no need to do
anything with the return value.

Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/filesystems/debugfs.txt

···
 
 If you want to dump an u32 array in debugfs, you can create file with:
 
-    struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
+    void debugfs_create_u32_array(const char *name, umode_t mode,
 			struct dentry *parent,
 			u32 *array, u32 elements);
 

fs/debugfs/file.c

···
  * @array as data. If the @mode variable is so set it can be read from.
  * Writing is not supported. Seek within the file is also not supported.
  * Once array is created its size can not be changed.
- *
- * The function returns a pointer to dentry on success. If an error occurs,
- * %ERR_PTR(-ERROR) or NULL will be returned. If debugfs is not enabled in
- * the kernel, the value %ERR_PTR(-ENODEV) will be returned.
  */
-struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
-					    struct dentry *parent,
-					    u32 *array, u32 elements)
+void debugfs_create_u32_array(const char *name, umode_t mode,
+			      struct dentry *parent, u32 *array, u32 elements)
 {
 	struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL);
 
 	if (data == NULL)
-		return NULL;
+		return;
 
 	data->array = array;
 	data->elements = elements;
 
-	return debugfs_create_file_unsafe(name, mode, parent, data,
-					&u32_array_fops);
+	debugfs_create_file_unsafe(name, mode, parent, data, &u32_array_fops);
 }
 EXPORT_SYMBOL_GPL(debugfs_create_u32_array);
 

include/linux/debugfs.h

···
 void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
 			  int nregs, void __iomem *base, char *prefix);
 
-struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
-					struct dentry *parent,
-					u32 *array, u32 elements);
+void debugfs_create_u32_array(const char *name, umode_t mode,
+			      struct dentry *parent, u32 *array, u32 elements);
 
 struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
 					   struct dentry *parent,
···
 	return false;
 }
 
-static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
-					struct dentry *parent,
-					u32 *array, u32 elements)
+static inline void debugfs_create_u32_array(const char *name, umode_t mode,
+					    struct dentry *parent, u32 *array,
+					    u32 elements)
 {
-	return ERR_PTR(-ENODEV);
 }
 
 static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,