linux-kernel - Re: [PATCH] ACPI: processor idle: fix swap.cocci warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 24 Nov 2021 17:48:17 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Guo Zhengkui <guozhengkui@...o.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel@...o.com
Subject: Re: [PATCH] ACPI: processor idle: fix swap.cocci warning

On Tue, Nov 9, 2021 at 8:51 AM Guo Zhengkui <guozhengkui@...o.com> wrote:
>
> Fix following coccicheck warning:
> ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c:914:40-41:
> WARNING opportunity for swap().
>
> swap() was used instead of the tmp variable to swap values.
>
> Signed-off-by: Guo Zhengkui <guozhengkui@...o.com>
> ---
>  drivers/acpi/processor_idle.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index 76ef1bcc8848..4b906bb527e8 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -20,6 +20,7 @@
>  #include <linux/tick.h>
>  #include <linux/cpuidle.h>
>  #include <linux/cpu.h>
> +#include <linux/minmax.h>
>  #include <acpi/processor.h>
>
>  /*
> @@ -400,13 +401,10 @@ static int acpi_cst_latency_cmp(const void *a, const void *b)
>  static void acpi_cst_latency_swap(void *a, void *b, int n)
>  {
>         struct acpi_processor_cx *x = a, *y = b;
> -       u32 tmp;
>
>         if (!(x->valid && y->valid))
>                 return;
> -       tmp = x->latency;
> -       x->latency = y->latency;
> -       y->latency = tmp;
> +       swap(x->latency, y->latency);
>  }
>
>  static int acpi_processor_power_verify(struct acpi_processor *pr)
> --

Applied as 5.17 material with edited subject and changelog, thanks!