57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
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// SPDX-License-Identifier: GPL-2.0-only
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///
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/// Please, don't reintroduce uninitialized_var().
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///
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/// From Documentation/process/deprecated.rst,
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/// commit 4b19bec97c88 ("docs: deprecated.rst: Add uninitialized_var()"):
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/// For any compiler warnings about uninitialized variables, just add
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/// an initializer. Using warning-silencing tricks is dangerous as it
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/// papers over real bugs (or can in the future), and suppresses unrelated
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/// compiler warnings (e.g. "unused variable"). If the compiler thinks it
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/// is uninitialized, either simply initialize the variable or make compiler
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/// changes. Keep in mind that in most cases, if an initialization is
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/// obviously redundant, the compiler's dead-store elimination pass will make
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/// sure there are no needless variable writes.
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///
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/// Later, commit 3942ea7a10c9 ("deprecated.rst: Remove now removed
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/// uninitialized_var") removed this section because all initializations of
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/// this kind were cleaned-up from the kernel. This cocci rule checks that
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/// the macro is not explicitly or implicitly reintroduced.
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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 context
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virtual report
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virtual org
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@r@
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identifier var;
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type T;
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position p;
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@@
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(
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* T var =@p var;
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* T var =@p *(&(var));
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* var =@p var
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* var =@p *(&(var))
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)
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@script:python depends on report@
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p << r.p;
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@@
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coccilib.report.print_report(p[0], "WARNING this kind of initialization is deprecated")
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@script:python depends on org@
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p << r.p;
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@@
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coccilib.org.print_todo(p[0], "WARNING this kind of initialization is deprecated")
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