K 10
svn:author
V 6
cognet
K 8
svn:date
V 27
2018-02-26T13:12:51.638148Z
K 7
svn:log
V 247
In do_ast, make sure the interrupts are enabled before calling ast().
We can reach that point with IRQs disabled, and calling ast() with IRQs 
disabled can lead to a deadlock.
This should fix the freezes on arm64 under load.

Reviewed by:	andrew

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