K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2012-06-02T18:10:16.631434Z
K 7
svn:log
V 260
Use plain store for atomic_store_rel on x86, instead of implicitly
locked xchg instruction.  IA32 memory model guarantees that store has
release semantic, since stores cannot pass loads or stores.

Reviewed by:	  bde, jhb
Tested by:	  pho
MFC after:	  2 weeks

END