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From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 21 Oct 2010 17:29:32 +0000 (UTC)
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Subject: cvs commit: src/sys/vm vm_map.c vm_map.h
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jhb         2010-10-21 17:29:32 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_map.c vm_map.h 
  Log:
  SVN rev 214144 on 2010-10-21 17:29:32Z by jhb
  
  - 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().
  
  Reviewed by:    alc
  MFC after:      1 month
  
  Revision  Changes    Path
  1.435     +1 -5      src/sys/vm/vm_map.c
  1.137     +1 -1      src/sys/vm/vm_map.h