unregister_chrdev

Name:register_chrdev_region() - unregister a range of device numbers*@from: the first in the range of numbers to unregister*@count: the number of device numbers to unregister* This function will unregister a range of @count device numbers,* starting with @from

Proto:void unregister_chrdev_region(dev_t from, unsigned count)

Type:void

Parameter:

Type	Parameter	Name
dev_t	from
unsigned	count

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to = from + count

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When n < to cycle

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next = MKDEV(MAJOR(n) + 1, 0)

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If next > to Then next = to

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kfree(__unregister_chrdev_region(MAJOR(n), MINOR(n), next - n))

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Function report