Why can't I do "mknod /dev/cdev c 32 0"

Wed Dec 1 18:03:16 PST 2004

I'm a newbie to freebsd. I'm trying to port a simple driver to freebsd, but something stopped me. I tried to use the /usr/share/examples to have a test, but mknod failed :
      mknod /dev/cdev c 32 0
even the make_dev call will cause system rebooting!

I don't know why.
Who can help me?
thanks.

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