parallelport module for measuring external interrupt latency

Dear Xenomai-Users / Developers,

I have finished my work on a parallelport module for measuring external
interrupt latencies. It is based on another kernel-module working on
plain linux. Interrupt latencies are measured via triggering an
interrupt over a connection between data pin 7 and the ACK-pin.

The kernel module loads fine without any problems. When starting the
User-space task the system freezes without any output in the kernel log.
 I was trying to solve the problem for several days now without any
success. I would appreciate, if somebody would have a short look on it.
Maybe its just a small problem which can be fixed easily.

The kernel-module as well as the user-space task are attached.

Thanks in advance and regards,
Markus Franke

PS.: I am aware of the fact that there is already a testcase in the
testsuite for measuring external interrupt latencies. Nevertheless, I
would like to gain experiences in developing with Xenomai and I want to
know why the attached code doesn't work. I will also work with the
testcases in the testsuite soon.

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