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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /scripts/coccinelle/api/alloc/alloc_cast.cocci | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'scripts/coccinelle/api/alloc/alloc_cast.cocci')
-rw-r--r-- | scripts/coccinelle/api/alloc/alloc_cast.cocci | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/alloc/alloc_cast.cocci b/scripts/coccinelle/api/alloc/alloc_cast.cocci new file mode 100644 index 000000000..f6f0ccdb6 --- /dev/null +++ b/scripts/coccinelle/api/alloc/alloc_cast.cocci @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// Remove casting the values returned by memory allocation functions +/// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc. +/// +//# This makes an effort to find cases of casting of values returned by +//# 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. +// +// Confidence: High +// Copyright: (C) 2014 Himangi Saraogi +// Copyright: (C) 2017 Himanshu Jha +// Comments: +// Options: --no-includes --include-headers +// + +virtual context +virtual patch +virtual org +virtual report + +@initialize:python@ +@@ +import re +pattern = '__' +m = re.compile(pattern) + +@r1 depends on context || patch@ +type T; +@@ + + (T *) + \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| + kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| + dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\| + kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| + pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| + kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) + +//---------------------------------------------------------- +// For context mode +//---------------------------------------------------------- + +@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 *) + \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| + kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| + dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\| + kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| + pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| + kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) + +//---------------------------------------------------------- +// For patch mode +//---------------------------------------------------------- + +@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 *) + \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| + kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| + dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\| + kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| + pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| + kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) + +//---------------------------------------------------------- +// For org and report mode +//---------------------------------------------------------- + +@r2 depends on org || report@ +type T; +position p; +@@ + + (T@p *) + \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| + kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| + dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\| + kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| + pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| + kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) + +@script:python depends on org@ +p << r2.p; +t << r2.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 << r2.p; +t << r2.T; +@@ + +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) |