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umtx: Add umtxq_requeue Linux emulation layer extension.
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Authored by dchagin on Jul 20 2021, 2:10 PM.
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This revision is now accepted and ready to land.Jul 21 2021, 7:34 PM
sys/kern/kern_umtx.c
652

umtxq_sleep() cannot tolerate the queue hash changing like this. It will wake up with the wrong hash chain lock held.