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authorHimanshu Jha <himanshujha199640@gmail.com>2018-01-13 21:26:30 +0530
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-01-16 23:38:53 +0900
commitd8e7eb51b03d83910d2dec48c5df4ec419a6bcff (patch)
tree1ce3c70770056f7701b585e92d4e816b0603951c
parentcb00a4f3dbd622acea1059c9da40131b8733d24e (diff)
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Coccinelle: alloc_cast: Add more memory allocating functions to the list
Add more memory allocating functions that are frequently used in the kernel code to the existing list and remove the useless casts where it is unnecessary. But preserve those casts having __attribute__ such as __force, __iomem, etc. which are used by Sparse in the static analysis of the code. Also remove two blank lines at EOF. Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
-rw-r--r--scripts/coccinelle/api/alloc/alloc_cast.cocci92
1 files changed, 71 insertions, 21 deletions
diff --git a/scripts/coccinelle/api/alloc/alloc_cast.cocci b/scripts/coccinelle/api/alloc/alloc_cast.cocci
index 6c308ee19b32..408ee3879f9b 100644
--- a/scripts/coccinelle/api/alloc/alloc_cast.cocci
+++ b/scripts/coccinelle/api/alloc/alloc_cast.cocci
@@ -5,10 +5,11 @@
//# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
//# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
//# the casting as it is not required. The result in the patch case may
-//#need some reformatting.
+//# need some reformatting.
//
// Confidence: High
-// Copyright: 2014, Himangi Saraogi GPLv2.
+// Copyright: (C) 2014 Himangi Saraogi GPLv2.
+// Copyright: (C) 2017 Himanshu Jha GPLv2.
// Comments:
// Options: --no-includes --include-headers
//
@@ -18,55 +19,104 @@ virtual patch
virtual org
virtual report
+@initialize:python@
+@@
+import re
+pattern = '__'
+m = re.compile(pattern)
+
+@r1 depends on context || patch@
+type T;
+@@
+
+ (T *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
+
//----------------------------------------------------------
// For context mode
//----------------------------------------------------------
-@depends on context@
-type T;
+@script:python depends on context@
+t << r1.T;
+@@
+
+if m.search(t) != None:
+ cocci.include_match(False)
+
+@depends on context && r1@
+type r1.T;
@@
* (T *)
\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
- kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
//----------------------------------------------------------
// For patch mode
//----------------------------------------------------------
-@depends on patch@
-type T;
+@script:python depends on patch@
+t << r1.T;
+@@
+
+if m.search(t) != None:
+ cocci.include_match(False)
+
+@depends on patch && r1@
+type r1.T;
@@
- (T *)
- (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
- kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...))
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
//----------------------------------------------------------
// For org and report mode
//----------------------------------------------------------
-@r depends on org || report@
+@r2 depends on org || report@
type T;
position p;
@@
- (T@p *)\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
- kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
+ (T@p *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
@script:python depends on org@
-p << r.p;
-t << r.T;
+p << r2.p;
+t << r2.T;
@@
-coccilib.org.print_safe_todo(p[0], t)
+if m.search(t) != None:
+ cocci.include_match(False)
+else:
+ coccilib.org.print_safe_todo(p[0], t)
@script:python depends on report@
-p << r.p;
-t << r.T;
+p << r2.p;
+t << r2.T;
@@
-msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t)
-coccilib.report.print_report(p[0], msg)
-
-
+if m.search(t) != None:
+ cocci.include_match(False)
+else:
+ msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t)
+ coccilib.report.print_report(p[0], msg)