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kernel/linux-rt-4.4.41/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci 1.7 KB
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  ///
  /// Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0
  ///
  // Copyright: (C) 2015 Intel Corp.  GPLv2.
  // Options: --no-includes --include-headers
  //
  // Keywords: dma_pool_zalloc, pci_pool_zalloc
  //
  
  virtual context
  virtual patch
  virtual org
  virtual report
  
  //----------------------------------------------------------
  //  For context mode
  //----------------------------------------------------------
  
  @depends on context@
  expression x;
  statement S;
  @@
  
  * x = \(dma_pool_alloc\|pci_pool_alloc\)(...);
    if ((x==NULL) || ...) S
  * memset(x,0, ...);
  
  //----------------------------------------------------------
  //  For patch mode
  //----------------------------------------------------------
  
  @depends on patch@
  expression x;
  expression a,b,c;
  statement S;
  @@
  
  - x = dma_pool_alloc(a,b,c);
  + x = dma_pool_zalloc(a,b,c);
    if ((x==NULL) || ...) S
  - memset(x,0,...);
  
  @depends on patch@
  expression x;
  expression a,b,c;
  statement S;
  @@
  
  - x = pci_pool_alloc(a,b,c);
  + x = pci_pool_zalloc(a,b,c);
    if ((x==NULL) || ...) S
  - memset(x,0,...);
  
  //----------------------------------------------------------
  //  For org and report mode
  //----------------------------------------------------------
  
  @r depends on org || report@
  expression x;
  expression a,b,c;
  statement S;
  position p;
  @@
  
   x = @p\(dma_pool_alloc\|pci_pool_alloc\)(a,b,c);
   if ((x==NULL) || ...) S
   memset(x,0, ...);
  
  @script:python depends on org@
  p << r.p;
  x << r.x;
  @@
  
  msg="%s" % (x)
  msg_safe=msg.replace("[","@(").replace("]",")")
  coccilib.org.print_todo(p[0], msg_safe)
  
  @script:python depends on report@
  p << r.p;
  x << r.x;
  @@
  
  msg="WARNING: *_pool_zalloc should be used for %s, instead of *_pool_alloc/memset" % (x)
  coccilib.report.print_report(p[0], msg)