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linker_kldload_busy(): allow recursion

Authored by kib on Nov 12 2021, 7:51 PM.


Some drivers recursively loads modules by explicit calls to kldload
during initialization, which might occur during kldload.

PR:     259748

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kib requested review of this revision.Nov 12 2021, 7:51 PM

The change looks ok, but after re-reading D30456 I wonder if busying should be done in sys_kldload() and sys_kldunload() instead. If the kernel initiates an unload at the "wrong" time then it's a bug in the initiator.

This revision is now accepted and ready to land.Nov 12 2021, 8:20 PM
This revision was automatically updated to reflect the committed changes.