K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2013-10-31T03:23:25.040358Z
K 7
svn:log
V 643
Do not EOI an interrupt until the point after the filter handlers / before
threaded handlers.

It's not easy to see from the diffs of this change exactly how it
accomplishes the above.  The arm_mask_irq() and arm_unmask_irq() functions
are, respectively, the pre_thread and post_thread hooks.  Not seen in
these diffs, the arm_post_filter() routine also EOIs.  The post_filter
routine runs after filter handlers if there will be no threaded handlers,
so it just EOIs.  The pre_thread routine masks the interrupt (at the
controller, not the source) and EOIs.  So one way or another, the EOI
happens at the point where filter handlers are done.

END