K 10
svn:author
V 5
mmacy
K 8
svn:date
V 27
2018-05-19T16:44:12.380122Z
K 7
svn:log
V 227
mp_ring: fix i386

Even though 64-bit atomics are supported on i386 there are panics
indicating that the code does not work correctly there. Switch
to mutex based variant (and fix that while we're here).

Reported by:	pho, kib

END