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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sun, 8 Feb 2009 19:55:03 +0000 (UTC)
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Subject: cvs commit: src/sys/vm vm_map.c
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kib         2009-02-08 19:55:03 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_map.c 
  Log:
  SVN rev 188323 on 2009-02-08 19:55:03Z by kib
  
  Lock the new map in vmspace_fork(). The newly allocated map should not
  be accessible outside vmspace_fork() yet, but locking it would satisfy
  the protocol of the vm_map_entry_link() and other functions called
  from vmspace_fork().
  
  Use trylock that is supposedly cannot fail, to silence WITNESS warning
  of the nested acquisition of the sx lock with the same name.
  
  Suggested and reviewed by:      tegge
  
  Revision  Changes    Path
  1.404     +5 -0      src/sys/vm/vm_map.c