set_user_nice() not defined on 2.4.21+

[Joakim Tjernlund]

> Hi Jocke,
> 
> Are you maintaining at least mtd/compatmac.h?

No, I just added set_user_nice() after discussion with David Woodhouse since I ran into
the same problem as you.
 
>  I also found a 
> compatibility problem of rq_data_dir(). I did find that this function is 
> already defined in linux/blkdev.h of 2.4.21-pre3. So probably 
> mtd/compatmac.h needn't define it again.

Best to run this via David Woodhouse. He knows this much better than I do. 

> 
> Joakim Tjernlund wrote:
> > Hi
> > 
> > I had the impression that set_user_nice() would be in 2.4.21 when I added set_user_nice() to 
> > mtd/compatmac.h. I can change it to KERNEL_VERSION(2,5,0) or someone can
> > submit a patch to Marcelo.
> 
> - Shawn.