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From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 31 Dec 2007 21:12:05 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Subject: cvs commit: src/sys/sys sysctl.h
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jhb         2007-12-31 21:12:05 UTC

  FreeBSD src repository

  Modified files:
    sys/sys              sysctl.h 
  Log:
  Add very basic support for the kernel to export a list of features.  Each
  feature is represented by a node in the new 'kern.features' sysctl node.
  A feature is present if the corresponding node is present and evaluates to
  true.
  
  A FEATURE() wrapper macro is added which takes the sysctl node name and
  a description of the feature as the sole arguments and creates a read-only
  sysctl node with a value of 1.
  
  Discussed on:   arch
  
  Revision  Changes    Path
  1.155     +8 -0      src/sys/sys/sysctl.h