linux-kernel - Re: [PATCH V2 04/15] ARM: exynos: cleanup cppcheck shifting error

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Date:   Mon, 24 Jun 2019 14:58:13 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Phong Tran <tranmanphong@...il.com>
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Subject: Re: [PATCH V2 04/15] ARM: exynos: cleanup cppcheck shifting error

On Mon, Jun 24, 2019 at 08:50:54PM +0700, Phong Tran wrote:
> [arch/arm/mach-exynos/suspend.c:288]: (error) Shifting signed 32-bit
> value by 31 bits is undefined behaviour
> 
> Signed-off-by: Phong Tran <tranmanphong@...il.com>
> ---
>  arch/arm/mach-exynos/suspend.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
> index be122af0de8f..b6a73dc5bde4 100644
> --- a/arch/arm/mach-exynos/suspend.c
> +++ b/arch/arm/mach-exynos/suspend.c
> @@ -285,7 +285,7 @@ static void exynos_pm_set_wakeup_mask(void)
>  	 * Set wake-up mask registers
>  	 * EXYNOS_EINT_WAKEUP_MASK is set by pinctrl driver in late suspend.
>  	 */
> -	pmu_raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK);
> +	pmu_raw_writel(exynos_irqwake_intmask & ~(BIT(31)), S5P_WAKEUP_MASK);

Parens around BIT() are no longer required.

>  }
>  
>  static void exynos_pm_enter_sleep_mode(void)
> -- 
> 2.11.0
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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