debugfs: remove return value of debugfs_create_file_size()

No one checks the return value of debugfs_create_file_size, as it's not
needed, so make the return value void, so that no one tries to do so in
the future.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200309163640.237984-1-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/filesystems/debugfs.txt

@@ -55,7 +55,7 @@ missing.
 Create a file with an initial size, the following function can be used
 instead:
 
-    struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
+    void debugfs_create_file_size(const char *name, umode_t mode,
 				  struct dentry *parent, void *data,
 				  const struct file_operations *fops,
 				  loff_t file_size);

fs/debugfs/inode.c

@@ -501,17 +501,8 @@ EXPORT_SYMBOL_GPL(debugfs_create_file_unsafe);
  * wide range of flexibility in creating a file, or a directory (if you want
  * to create a directory, the debugfs_create_dir() function is
  * recommended to be used instead.)
- *
- * This function will return a pointer to a dentry if it succeeds.  This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.
  */
-struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
+void debugfs_create_file_size(const char *name, umode_t mode,
 			      struct dentry *parent, void *data,
 			      const struct file_operations *fops,
 			      loff_t file_size)
@@ -520,7 +511,6 @@ struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
 
 	if (de)
 		d_inode(de)->i_size = file_size;
-	return de;
 }
 EXPORT_SYMBOL_GPL(debugfs_create_file_size);
 

include/linux/debugfs.h

@@ -67,7 +67,7 @@ struct dentry *debugfs_create_file_unsafe(const char *name, umode_t mode,
 				   struct dentry *parent, void *data,
 				   const struct file_operations *fops);
 
-struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
+void debugfs_create_file_size(const char *name, umode_t mode,
 			      struct dentry *parent, void *data,
 			      const struct file_operations *fops,
 			      loff_t file_size);
@@ -181,13 +181,11 @@ static inline struct dentry *debugfs_create_file_unsafe(const char *name,
 	return ERR_PTR(-ENODEV);
 }
 
-static inline struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
+static inline void debugfs_create_file_size(const char *name, umode_t mode,
 					    struct dentry *parent, void *data,
 					    const struct file_operations *fops,
 					    loff_t file_size)
-{
-	return ERR_PTR(-ENODEV);
-}
+{ }
 
 static inline struct dentry *debugfs_create_dir(const char *name,
 						struct dentry *parent)