linux-kernel - Re: [PATCH] coccinelle: misc: update uninitialized

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Date:   Wed, 24 Mar 2021 21:31:23 +0100 (CET)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Denis Efremov <efremov@...ux.com>
cc:     cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coccinelle: misc: update uninitialized_var.cocci
 documentation



On Mon, 8 Mar 2021, Denis Efremov wrote:

> Remove the documentation link from the warning message because commit
> 3942ea7a10c9 ("deprecated.rst: Remove now removed uninitialized_var")
> removed the section from documentation. Update the rule documentation
> accordingly.
>
> Signed-off-by: Denis Efremov <efremov@...ux.com>

Applied, thanks.

julia

> ---
>  scripts/coccinelle/misc/uninitialized_var.cocci | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/scripts/coccinelle/misc/uninitialized_var.cocci b/scripts/coccinelle/misc/uninitialized_var.cocci
> index 8fa845cefe11..69bbaae47e73 100644
> --- a/scripts/coccinelle/misc/uninitialized_var.cocci
> +++ b/scripts/coccinelle/misc/uninitialized_var.cocci
> @@ -1,7 +1,9 @@
>  // SPDX-License-Identifier: GPL-2.0-only
>  ///
>  /// Please, don't reintroduce uninitialized_var().
> -/// From Documentation/process/deprecated.rst:
> +///
> +/// 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
> @@ -11,6 +13,11 @@
>  ///  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
> @@ -40,12 +47,10 @@ position p;
>  p << r.p;
>  @@
>
> -coccilib.report.print_report(p[0],
> -  "WARNING this kind of initialization is deprecated (https://www.kernel.org/doc/html/latest/process/deprecated.html#uninitialized-var)")
> +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 (https://www.kernel.org/doc/html/latest/process/deprecated.html#uninitialized-var)")
> +coccilib.org.print_todo(p[0], "WARNING this kind of initialization is deprecated")
> --
> 2.26.2
>
>