K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2011-01-25T19:44:55.916097Z
K 7
svn:log
V 330
MFC 214144:
- Make 'vm_refcnt' volatile so that compilers won't be tempted to treat
  its value as a loop invariant.  Currently this is a no-op because
  'atomic_cmpset_int()' clobbers all memory on current architectures.
- Use atomic_fetchadd_int() instead of an atomic_cmpset_int() loop to drop
  a reference in vmspace_free().

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