https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 9abf2313adc1ca1b6180c508c25f22f9395cc780 authored by Linus Torvalds on 16 October 2022, 22:36:24 UTC
Linux 6.1-rc1
Linux 6.1-rc1
Tip revision: 9abf231
uninitialized_var.cocci
// SPDX-License-Identifier: GPL-2.0-only
///
/// Please, don't reintroduce uninitialized_var().
///
/// From Documentation/process/deprecated.rst,
/// commit 4b19bec97c88 ("docs: deprecated.rst: Add uninitialized_var()"):
/// For any compiler warnings about uninitialized variables, just add
/// an initializer. Using warning-silencing tricks is dangerous as it
/// papers over real bugs (or can in the future), and suppresses unrelated
/// compiler warnings (e.g. "unused variable"). If the compiler thinks it
/// is uninitialized, either simply initialize the variable or make compiler
/// changes. Keep in mind that in most cases, if an initialization is
/// obviously redundant, the compiler's dead-store elimination pass will make
/// sure there are no needless variable writes.
///
/// Later, commit 3942ea7a10c9 ("deprecated.rst: Remove now removed
/// uninitialized_var") removed this section because all initializations of
/// this kind were cleaned-up from the kernel. This cocci rule checks that
/// the macro is not explicitly or implicitly reintroduced.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
virtual context
virtual report
virtual org
@r@
identifier var;
type T;
position p;
@@
(
* T var =@p var;
|
* T var =@p *(&(var));
|
* var =@p var
|
* var =@p *(&(var))
)
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING this kind of initialization is deprecated")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING this kind of initialization is deprecated")