Thank you for your reply. > If these really are "deprecated", According to the comment in file "include/linux/idr.h" (line 318) these macros are depricated. > why not just do a search/replace across the whole tree and change them? I've stumbled across these macros while trying to figure out how to write device driver using serial device bus. So, I've decided to change them with appropriate function calls. I didn't do search/replace across the whole tree because it's my first patch and I wanted it to be short. But now, when you mentioned it, I will do it. Thank you for your time, Ivan Bakula