From: Tom Herbert
Date: Wed, 5 Aug 2015 09:39:27 -0700
> There is a race condition in store_rps_map that allows jump label
> count in rps_needed to go below zero. This can happen when
> concurrently attempting to set and a clear map.
>
> Scenario:
>
> 1. rps_needed count is zero
> 2. New map is
There is a race condition in store_rps_map that allows jump label
count in rps_needed to go below zero. This can happen when
concurrently attempting to set and a clear map.
Scenario:
1. rps_needed count is zero
2. New map is assigned by setting thread, but rps_needed count _not_ yet
incremente
