securityfs: fix long-broken securityfs_create_file comment

If there is an error creating a file through securityfs_create_file,
NULL is not returned, rather the error is propagated.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

security/inode.c

@@ -205,12 +205,11 @@ static int create_by_name(const char *name, mode_t mode,
  * This function returns a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the securityfs_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, %NULL is returned.
+ * you are responsible here).  If an error occurs, the function will return
+ * the erorr value (via ERR_PTR).
  *
  * If securityfs is not enabled in the kernel, the value %-ENODEV is
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * returned.
  */
 struct dentry *securityfs_create_file(const char *name, mode_t mode,
 				   struct dentry *parent, void *data,