linux-kernel - Re: [PATCH v2] Coccinelle: kzalloc-simple: Add all zero allocating functions

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Message-ID: <CAK7LNAR27r4j4c1FCh_ObpMpBKXgSP6Vq3P=reA-JKoTji6Q1A@mail.gmail.com>
Date:   Sat, 30 Dec 2017 02:22:19 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Himanshu Jha <himanshujha199640@...il.com>
Cc:     Julia Lawall <Julia.Lawall@...6.fr>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Michal Marek <michal.lkml@...kovi.net>, cocci@...teme.lip6.fr,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] Coccinelle: kzalloc-simple: Add all zero allocating functions

2017-12-27 6:40 GMT+09:00 Himanshu Jha <himanshujha199640@...il.com>:
> There are many instances where memory is allocated using regular
> allocator
> functions immediately followed by setting the allocated memory
> to 0 value using memset.
>
> We already have zero memory allocator functions to set the memory to
> 0 value instead of manually setting it using memset.
>
> Therefore, use zero memory allocating functions instead of regular
> memory allocators followed by memset 0 to remove redundant memset and
> make the code more cleaner and also reduce the code size.
>
> Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
> ---
>
> v2:
>    -fix typo in copyright.
>    -move all the (T *) disjunction cases before (T) as (T) matches any cast
>     at all including (T *) ones which is not desirable.
>

...

> +@...ipt:python depends on report@
> +p << r9.p;
> +x << r9.x;
> +@@
> +
> +msg="WARNING: kvzalloc_node should be used for %s, instead of kvmalloc_node/memset" % (x)
> +coccilib.report.print_report(p[0], msg)
> +


I removed the blank line at EOF,
then applied to linux-kbuild/misc.  Thanks!




-- 
Best Regards
Masahiro Yamada