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Date: Sat, 13 Jan 2018 21:26:30 +0530
From: Himanshu Jha <himanshujha199640@...il.com>
To: yamada.masahiro@...ionext.com
Cc: Julia.Lawall@...6.fr, Gilles.Muller@...6.fr, nicolas.palix@...g.fr,
michal.lkml@...kovi.net, cocci@...teme.lip6.fr,
linux-kernel@...r.kernel.org,
Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH] 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@...il.com>
---
scripts/coccinelle/api/alloc/alloc_cast.cocci | 92 +++++++++++++++++++++------
1 file changed, 71 insertions(+), 21 deletions(-)
diff --git a/scripts/coccinelle/api/alloc/alloc_cast.cocci b/scripts/coccinelle/api/alloc/alloc_cast.cocci
index 6c308ee..408ee38 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
+@...tialize: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
//----------------------------------------------------------
-@...ends on context@
-type T;
+@...ipt:python depends on context@
+t << r1.T;
+@@
+
+if m.search(t) != None:
+ cocci.include_match(False)
+
+@...ends 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
//----------------------------------------------------------
-@...ends on patch@
-type T;
+@...ipt:python depends on patch@
+t << r1.T;
+@@
+
+if m.search(t) != None:
+ cocci.include_match(False)
+
+@...ends 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)
--
2.7.4
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