Thread: Allocation of major number and minor number linux

HI
1.How do i allocate major mumber and minor numbers in linux 2.6.8 version.
Any idea.

2. Can we allocate Major numbers and minor numbers Dynamically?

HI

Quote: Salem
Its a problem i a facing. I am facing this problem from a hour .if u can solve my problem then fine otherwise pls do not pass comments. This is a request.

Thanks,

Will this code work for alocating minor and major numbers
insert

Code:

if(skull_major)
   {
        /* Legacy support for direct assignment */
        dev = MKDEV(skull_major, skull_minor);
        result = register_chrdev_region(dev, scull_nr_devs, "skull");
   }
   else
   {
        /* Dynamic allocation support */
        result = alloc_chrdev_region(&dev, skull_minor, skull_nr_devs, "skull");
        skull_major = MAJOR(dev));
   }
        
   /* Allocation/assignment failure notice */
   (result < 0)?(printk(KERN_WARNING "skull: can't get major %d\n", 
skull_major);

Here's something from an older book on the subject:
http://www.xml.com/ldd/chapter/book/ch03.html#t2

gg