[issue174] Unloading md module causes a panic

[Antonio Huete Jimenez (via DragonFly issue tracker)]

Antonio Huete Jimenez <tuxillo at quantumachine.net> added the comment:

Hi,

I think what is happening here is , despite md is already included in the
kernel, the module is not registered and thus modlist_lookup2() doesn't find it,
so kldload() syscall succeeds instead of failing in EEXIST as it should be.

I'm going to try to provide a patch to fix this based on some recommendatiosn
given by Alex.

Cheers,
Antonio Huete

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assignedto:  -> tuxillo

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