Now
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Implement a C version of splx() in evtchn_do_event(). using plain splx()
here will reenable interrupts as a side effect, and we don't want it here.
It could cause some event handlers to run twice (which should be harmless),
and trap() to be called on the wrong LWP in doreti_checkast (which can
probably cause some damage).
here will reenable interrupts as a side effect, and we don't want it here.
It could cause some event handlers to run twice (which should be harmless),
and trap() to be called on the wrong LWP in doreti_checkast (which can
probably cause some damage).