svn commit: r315186 - head/lib/libcam

[Ngie Cooper]

Author: ngie
Date: Mon Mar 13 02:12:33 2017
New Revision: 315186
URL: https://svnweb.freebsd.org/changeset/base/315186

Log:
  lib/libcam/cam.3: note that cam_freeccb(3) with ccb == NULL is a no-op
  
  This allows me to accurately test this scenario, and for others to rely
  on the behavior, instead of relying on knowledge obtained via code
  inspection.
  
  Wording borrowed from free(3).
  
  MFC after:	1 week
  Requested by:	ken (D9928)
  Reviewed by:	imp
  Sponsored by:	Dell EMC Isilon
  Differential Revision:	D9969

Modified:
  head/lib/libcam/cam.3

Modified: head/lib/libcam/cam.3
==============================================================================
--- head/lib/libcam/cam.3	Mon Mar 13 01:34:42 2017	(r315185)
+++ head/lib/libcam/cam.3	Mon Mar 13 02:12:33 2017	(r315186)
@@ -302,6 +302,11 @@ structure.
 .Fn cam_freeccb
 frees CCBs allocated by
 .Fn cam_getccb .
+If
+.Va ccb
+is
+.Dv NULL ,
+no action is taken.
 .Pp
 .Fn cam_path_string
 takes as arguments a