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From: Andrew Thompson <thompsa@FreeBSD.org>
Date: Wed, 21 Jan 2009 04:19:18 +0000 (UTC)
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Subject: cvs commit: src/sys/kern subr_witness.c src/sys/sys lock.h
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thompsa     2009-01-21 04:19:18 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             subr_witness.c 
    sys/sys              lock.h 
  Log:
  SVN rev 187511 on 2009-01-21 04:19:18Z by thompsa
  
  Add functions WITNESS so it can be asserted that the lock is not released for a
  section of code, this uses WITNESS_NORELEASE() and WITNESS_RELEASEOK() to mark
  the boundaries. Both functions require the lock to be held when calling.
  
  This is intended for scenarios like a bus asserting that the bus lock is not
  dropped during a driver call. There doesn't appear to be a man page to
  document this in.
  
  Reviewed by:    jhb
  
  Revision  Changes    Path
  1.264     +49 -0     src/sys/kern/subr_witness.c
  1.76      +10 -0     src/sys/sys/lock.h