Re: Issue with limitation of 256 minors per major in LiS 2.16 on Linu x 2.4

Hi Eashwaran.

> I can do that in my driver and have an array of 4 major numbers each 
> capable of 256 minor numbers.  My question is: when I return from 
> device_open routine, if I change the major number of the device to 
> another major number (allocated for the same driver) will it work?   

We do exactly this for the same reasons and yes it works.

     *devp = makedevice(pktmajors[slot >> MINORBITS], (slot & MINORMASK));
     return (0);

> Even if the above strategy is alright, do you think it will still work 
> even if my driver uses locks.  Currently I use 2 lis_rw_lock_t and 1 
> lis_spin_lock_t structures to safeguard common data and critical sections.

We also do this.  I can't think of a sane locking strategy that would be
affected by having multiple majors.

Regards,
	Steve

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Steve Schefter                               phone: +1 705 725 9999 x26
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