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alloc_chrdev_region creates extra major numbers

Hi.


My question is: is it OK to the minor numbers to expand
to the next major number when the major number is dynamic?


This call:

ret_val = alloc_chrdev_region(&dev, 0, 4, "fullex");

works as expected.


$ cat /proc/devices
Character devices:
251 fullex
252 fullex
253 fullex
254 fullex

major = MAJOR(dev);

If major is 251, I do:

mknod /dev/fullex0 c 251 0
mknod /dev/fullex1 c 251 1
mknod /dev/fullex2 c 251 2
mknod /dev/fullex3 c 251 3

And all devices work as expected (I made a test with private data
for each device and all /dev/fullex* are different).

Source code:

https://svn.arhuaco.org/svn/src/linux/examples/modules/full/fullex.c

(I'm convertin this file to the 2.6 char device way, it's an example
and I need to use spanish in the comments)

Regards.

--
http://arhuaco.org/

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