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coccinelle: api: add kvmalloc script
Suggest kvmalloc, kvfree instead of opencoded patterns. Signed-off-by: Denis Efremov <efremov@linux.com> Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
This commit is contained in:
Denis Efremov
Julia Lawall
parent
e16a7c47d5
commit
44d8870f21
256
scripts/coccinelle/api/kvmalloc.cocci
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256
scripts/coccinelle/api/kvmalloc.cocci
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// SPDX-License-Identifier: GPL-2.0-only
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///
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/// Find if/else condition with kmalloc/vmalloc calls.
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/// Suggest to use kvmalloc instead. Same for kvfree.
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///
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// Confidence: High
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// Copyright: (C) 2020 Denis Efremov ISPRAS
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// Options: --no-includes --include-headers
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//
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virtual patch
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virtual report
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virtual org
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virtual context
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@initialize:python@
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@@
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filter = frozenset(['kvfree'])
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def relevant(p):
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return not (filter & {el.current_element for el in p})
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@kvmalloc depends on !patch@
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expression E, E1, size;
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identifier flags;
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binary operator cmp = {<=, <, ==, >, >=};
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identifier x;
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type T;
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position p;
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@@
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(
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* if (size cmp E1 || ...)@p {
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...
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* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
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* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
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* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...)
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...
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} else {
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...
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* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
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...
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}
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* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
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* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
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* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...)
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... when != E = E1
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when != size = E1
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when any
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* if (E == NULL)@p {
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...
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* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
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...
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}
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* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
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* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
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* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...);
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... when != x = E1
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when != size = E1
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when any
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* if (x == NULL)@p {
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...
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* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
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...
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}
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)
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@kvfree depends on !patch@
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expression E;
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position p : script:python() { relevant(p) };
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@@
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* if (is_vmalloc_addr(E))@p {
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...
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* vfree(E)
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...
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} else {
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... when != krealloc(E, ...)
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when any
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* \(kfree\|kzfree\)(E)
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...
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}
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@depends on patch@
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expression E, E1, size, node;
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binary operator cmp = {<=, <, ==, >, >=};
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identifier flags, x;
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type T;
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@@
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(
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- if (size cmp E1)
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- E = kmalloc(size, flags);
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- else
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- E = vmalloc(size);
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+ E = kvmalloc(size, flags);
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- if (size cmp E1)
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- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- else
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- E = vmalloc(size);
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+ E = kvmalloc(size, GFP_KERNEL);
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- E = kmalloc(size, flags | __GFP_NOWARN);
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- if (E == NULL)
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- E = vmalloc(size);
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+ E = kvmalloc(size, flags);
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- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- if (E == NULL)
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- E = vmalloc(size);
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+ E = kvmalloc(size, GFP_KERNEL);
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- T x = kmalloc(size, flags | __GFP_NOWARN);
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- if (x == NULL)
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- x = vmalloc(size);
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+ T x = kvmalloc(size, flags);
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- T x = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- if (x == NULL)
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- x = vmalloc(size);
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+ T x = kvmalloc(size, GFP_KERNEL);
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- if (size cmp E1)
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- E = kzalloc(size, flags);
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- else
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- E = vzalloc(size);
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+ E = kvzalloc(size, flags);
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- if (size cmp E1)
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- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- else
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- E = vzalloc(size);
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+ E = kvzalloc(size, GFP_KERNEL);
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- E = kzalloc(size, flags | __GFP_NOWARN);
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- if (E == NULL)
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- E = vzalloc(size);
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+ E = kvzalloc(size, flags);
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- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- if (E == NULL)
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- E = vzalloc(size);
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+ E = kvzalloc(size, GFP_KERNEL);
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- T x = kzalloc(size, flags | __GFP_NOWARN);
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- if (x == NULL)
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- x = vzalloc(size);
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+ T x = kvzalloc(size, flags);
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- T x = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
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- if (x == NULL)
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- x = vzalloc(size);
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+ T x = kvzalloc(size, GFP_KERNEL);
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- if (size cmp E1)
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- E = kmalloc_node(size, flags, node);
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- else
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- E = vmalloc_node(size, node);
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+ E = kvmalloc_node(size, flags, node);
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- if (size cmp E1)
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- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- else
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- E = vmalloc_node(size, node);
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+ E = kvmalloc_node(size, GFP_KERNEL, node);
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- E = kmalloc_node(size, flags | __GFP_NOWARN, node);
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- if (E == NULL)
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- E = vmalloc_node(size, node);
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+ E = kvmalloc_node(size, flags, node);
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- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- if (E == NULL)
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- E = vmalloc_node(size, node);
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+ E = kvmalloc_node(size, GFP_KERNEL, node);
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- T x = kmalloc_node(size, flags | __GFP_NOWARN, node);
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- if (x == NULL)
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- x = vmalloc_node(size, node);
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+ T x = kvmalloc_node(size, flags, node);
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- T x = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- if (x == NULL)
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- x = vmalloc_node(size, node);
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+ T x = kvmalloc_node(size, GFP_KERNEL, node);
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- if (size cmp E1)
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- E = kvzalloc_node(size, flags, node);
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- else
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- E = vzalloc_node(size, node);
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+ E = kvzalloc_node(size, flags, node);
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- if (size cmp E1)
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- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- else
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- E = vzalloc_node(size, node);
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+ E = kvzalloc_node(size, GFP_KERNEL, node);
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- E = kvzalloc_node(size, flags | __GFP_NOWARN, node);
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- if (E == NULL)
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- E = vzalloc_node(size, node);
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+ E = kvzalloc_node(size, flags, node);
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- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- if (E == NULL)
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- E = vzalloc_node(size, node);
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+ E = kvzalloc_node(size, GFP_KERNEL, node);
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- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node);
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- if (x == NULL)
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- x = vzalloc_node(size, node);
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+ T x = kvzalloc_node(size, flags, node);
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- T x = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
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- if (x == NULL)
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- x = vzalloc_node(size, node);
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+ T x = kvzalloc_node(size, GFP_KERNEL, node);
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)
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@depends on patch@
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expression E;
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position p : script:python() { relevant(p) };
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@@
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- if (is_vmalloc_addr(E))@p
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- vfree(E);
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- else
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- kfree(E);
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+ kvfree(E);
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@script: python depends on report@
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p << kvmalloc.p;
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@@
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coccilib.report.print_report(p[0], "WARNING opportunity for kvmalloc")
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@script: python depends on org@
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p << kvmalloc.p;
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@@
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coccilib.org.print_todo(p[0], "WARNING opportunity for kvmalloc")
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@script: python depends on report@
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p << kvfree.p;
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@@
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coccilib.report.print_report(p[0], "WARNING opportunity for kvfree")
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@script: python depends on org@
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p << kvfree.p;
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@@
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coccilib.org.print_todo(p[0], "WARNING opportunity for kvfree")
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