linux-kernel - Re: [PATCH] deprecated.rst: Remove now removed uninitialized

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Date:   Wed, 26 Aug 2020 20:27:34 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>,
        Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-doc <linux-doc@...r.kernel.org>
Subject: Re: [PATCH] deprecated.rst: Remove now removed uninitialized_var

On Wed, Aug 26, 2020 at 8:12 PM Joe Perches <joe@...ches.com> wrote:
>
> It's now gone from the kernel so remove it from the deprecated API text.
>
> Signed-off-by: Joe Perches <joe@...ches.com>

Thanks Joe.
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  Documentation/process/deprecated.rst | 18 ------------------
>  1 file changed, 18 deletions(-)
>
> diff --git a/Documentation/process/deprecated.rst b/Documentation/process/deprecated.rst
> index 918e32d76fc4..70720f00b9aa 100644
> --- a/Documentation/process/deprecated.rst
> +++ b/Documentation/process/deprecated.rst
> @@ -51,24 +51,6 @@ to make sure their systems do not continue running in the face of
>  "unreachable" conditions. (For example, see commits like `this one
>  <https://git.kernel.org/linus/d4689846881d160a4d12a514e991a740bcb5d65a>`_.)
>
> -uninitialized_var()
> --------------------
> -For any compiler warnings about uninitialized variables, just add
> -an initializer. Using the uninitialized_var() macro (or similar
> -warning-silencing tricks) is dangerous as it papers over `real bugs
> -<https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/>`_
> -(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.
> -
> -As Linus has said, this macro
> -`must <https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/>`_
> -`be <https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/>`_
> -`removed <https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/>`_.
> -
>  open-coded arithmetic in allocator arguments
>  --------------------------------------------
>  Dynamic size calculations (especially multiplication) should not be
>
>


-- 
Thanks,
~Nick Desaulniers