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kernel/linux-imx6_3.14.28/scripts/coccinelle/free/iounmap.cocci 1.25 KB
6b13f685e   김민수   BSP 최초 추가
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  /// Find missing iounmaps.
  ///
  //# This only signals a missing iounmap when there is an iounmap later
  //# in the same function.
  //# False positives can be due to loops.
  //
  // Confidence: Moderate
  // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
  // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
  // URL: http://coccinelle.lip6.fr/
  // Comments:
  // Options:
  
  virtual context
  virtual org
  virtual report
  
  @iom@
  expression e;
  statement S,S1;
  int ret;
  position p1,p2,p3;
  @@
  
  e = \(ioremap@p1\|ioremap_nocache@p1\)(...)
  ... when != iounmap(e)
  if (<+...e...+>) S
  ... when any
      when != iounmap(e)
      when != if (...) { ... iounmap(e); ... }
  (
   if (ret == 0) S1
  |
  if (...)
     { ...
       return 0; }
  |
  if (...)
     { ...
       return <+...e...+>; }
  |
  *if@p2 (...)
     { ... when != iounmap(e)
           when forall
       return@p3 ...; }
  )
  ... when any
  iounmap(e);
  
  @script:python depends on org@
  p1 << iom.p1;
  p2 << iom.p2;
  p3 << iom.p3;
  @@
  
  cocci.print_main("ioremap",p1)
  cocci.print_secs("if",p2)
  cocci.print_secs("needed iounmap",p3)
  
  @script:python depends on report@
  p1 << iom.p1;
  p2 << iom.p2;
  p3 << iom.p3;
  @@
  
  msg = "ERROR: missing iounmap; ioremap on line %s and execution via conditional on line %s" % (p1[0].line,p2[0].line)
  coccilib.report.print_report(p3[0],msg)