linux-kernel - Re: [PATCH] power: supply: core: fix clang -Wunsequenced

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Date:   Thu, 2 May 2019 22:15:54 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Phong Tran <tranmanphong@...il.com>
Cc:     ndesaulniers@...gle.com, natechancellor@...il.com,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] power: supply: core: fix clang -Wunsequenced

Hi,

On Thu, May 02, 2019 at 08:27:06AM +0700, Phong Tran wrote:
> The increment operator of  pointer in be32_to_cpu() is not explicitly.
> It made the warning from clang:
> 
> drivers/power/supply/power_supply_core.c:674:36: error: multiple
> unsequenced modifications to 'list' [-Werror,-Wunsequenced]
> drivers/power/supply/power_supply_core.c:675:41: error: multiple
> unsequenced modifications to 'list' [-Werror,-Wunsequenced]
> 
> Link: https://github.com/ClangBuiltLinux/linux/issues/460
> 
> Signed-off-by: Phong Tran <tranmanphong@...il.com>
> ---

Thanks, queued to power-supply's for-next branch.

-- Sebastian

>  drivers/power/supply/power_supply_core.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
> index c917a8b43b2b..7cc6f5fac0d0 100644
> --- a/drivers/power/supply/power_supply_core.c
> +++ b/drivers/power/supply/power_supply_core.c
> @@ -665,8 +665,10 @@ int power_supply_get_battery_info(struct power_supply *psy,
>  		}
>  
>  		for (i = 0; i < tab_len; i++) {
> -			table[i].ocv = be32_to_cpu(*list++);
> -			table[i].capacity = be32_to_cpu(*list++);
> +			table[i].ocv = be32_to_cpu(*list);
> +			list++;
> +			table[i].capacity = be32_to_cpu(*list);
> +			list++;
>  		}
>  	}
>  
> -- 
> 2.21.0
> 

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