linux-kernel - Re: [PATCH -next] LoongArch: Fix unsigned comparison with less than zero

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Date:   Fri, 22 Jul 2022 10:41:39 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev,
        LKML <linux-kernel@...r.kernel.org>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH -next] LoongArch: Fix unsigned comparison with less than zero

Hi, Yang Li,

Thank you for your patch. This looks good to me and will be queued for
5.20, since Marc said he will not rebase his branch. :)

Huacai

On Fri, Jul 22, 2022 at 8:42 AM Yang Li <yang.lee@...ux.alibaba.com> wrote:
>
> The return from the call to get_timer_irq() is int, it can be
> a negative error code, however this is being assigned to an
> unsigned int variable 'irq', so making 'irq' an int.
>
> Eliminate the following coccicheck warning:
> ./arch/loongarch/kernel/time.c:146:5-8: WARNING: Unsigned expression compared with zero: irq < 0
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  arch/loongarch/kernel/time.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/loongarch/kernel/time.c b/arch/loongarch/kernel/time.c
> index 79dc5eddf504..786735dcc8d6 100644
> --- a/arch/loongarch/kernel/time.c
> +++ b/arch/loongarch/kernel/time.c
> @@ -135,7 +135,7 @@ static int get_timer_irq(void)
>
>  int constant_clockevent_init(void)
>  {
> -       unsigned int irq;
> +       int irq;
>         unsigned int cpu = smp_processor_id();
>         unsigned long min_delta = 0x600;
>         unsigned long max_delta = (1UL << 48) - 1;
> --
> 2.20.1.7.g153144c
>