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inpcb: use epoch protection when doing prison checks
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Authored by glebius on Dec 8 2021, 6:43 PM.
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Details

Summary

The pcb lookup always happens in the network epoch and in SMR section.
We can't block on a mutex due to the latter. Now that prison address
lists are protected by the network epoch, use the locked variant of KPI.

Fixes: de2d47842e8

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rG FreeBSD src repository
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