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kernel/linux-imx6_3.14.28/scripts/coccinelle/misc/warn.cocci 1.62 KB
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  /// Use WARN(1,...) rather than printk followed by WARN_ON(1)
  ///
  // Confidence: High
  // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
  // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
  // URL: http://coccinelle.lip6.fr/
  // Comments:
  // Options: --no-includes --include-headers
  
  virtual patch
  virtual context
  virtual org
  virtual report
  
  @bad1@
  position p;
  @@
  
  printk(...);
  printk@p(...);
  WARN_ON(1);
  
  @r1 depends on context || report || org@
  position p != bad1.p;
  @@
  
   printk@p(...);
  *WARN_ON(1);
  
  @script:python depends on org@
  p << r1.p;
  @@
  
  cocci.print_main("printk + WARN_ON can be just WARN",p)
  
  @script:python depends on report@
  p << r1.p;
  @@
  
  msg = "SUGGESTION: printk + WARN_ON can be just WARN"
  coccilib.report.print_report(p[0],msg)
  
  @ok1 depends on patch@
  expression list es;
  position p != bad1.p;
  @@
  
  -printk@p(
  +WARN(1,
    es);
  -WARN_ON(1);
  
  @depends on patch@
  expression list ok1.es;
  @@
  
  if (...)
  - {
    WARN(1,es);
  - }
  
  // --------------------------------------------------------------------
  
  @bad2@
  position p;
  @@
  
  printk(...);
  printk@p(...);
  WARN_ON_ONCE(1);
  
  @r2 depends on context || report || org@
  position p != bad1.p;
  @@
  
   printk@p(...);
  *WARN_ON_ONCE(1);
  
  @script:python depends on org@
  p << r2.p;
  @@
  
  cocci.print_main("printk + WARN_ON_ONCE can be just WARN_ONCE",p)
  
  @script:python depends on report@
  p << r2.p;
  @@
  
  msg = "SUGGESTION: printk + WARN_ON_ONCE can be just WARN_ONCE"
  coccilib.report.print_report(p[0],msg)
  
  @ok2 depends on patch@
  expression list es;
  position p != bad2.p;
  @@
  
  -printk@p(
  +WARN_ONCE(1,
    es);
  -WARN_ON_ONCE(1);
  
  @depends on patch@
  expression list ok2.es;
  @@
  
  if (...)
  - {
    WARN_ONCE(1,es);
  - }