linux-kernel - Re: [PATCH] soc: kunpeng_hccs: fix size

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Date:   Mon, 14 Aug 2023 08:56:06 +0800
From:   Wei Xu <xuwei5@...ilicon.com>
To:     Arnd Bergmann <arnd@...nel.org>, Huisong Li <lihuisong@...wei.com>
CC:     Arnd Bergmann <arnd@...db.de>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] soc: kunpeng_hccs: fix size_t format string

Hi Arnd,

On 2023/8/13 1:21, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Printing a size_t using the %lu format string causes a warning on
> architectures that define the type as 'unsigned int':
> 
> In file included from include/linux/device.h:15,
>                  from include/linux/acpi.h:14,
>                  from drivers/soc/hisilicon/kunpeng_hccs.c:25:
> drivers/soc/hisilicon/kunpeng_hccs.c: In function 'hccs_get_bd_info':
> drivers/soc/hisilicon/kunpeng_hccs.c:441:25: error: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'size_t' {aka 'unsigned int'} [-Werror=format=]
> 
> Use the correct %zu format instead.
> 
> Fixes: 886bdf9c883bc ("soc: hisilicon: Support HCCS driver on Kunpeng SoC")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> I've already applied this one on top of the soc/drivers branch after I
> merged the branch with the new driver and noticed the regression.
> 
>  drivers/soc/hisilicon/kunpeng_hccs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
> index 6864d203c6782..0d6f6bacd3f62 100644
> --- a/drivers/soc/hisilicon/kunpeng_hccs.c
> +++ b/drivers/soc/hisilicon/kunpeng_hccs.c
> @@ -438,7 +438,7 @@ static int hccs_get_bd_info(struct hccs_dev *hdev, u8 opcode,
>  	head = &rsp->rsp_head;
>  	if (head->data_len > buf_len) {
>  		dev_err(hdev->dev,
> -			"buffer overflow (buf_len = %lu, data_len = %u)!\n",
> +			"buffer overflow (buf_len = %zu, data_len = %u)!\n",
>  			buf_len, head->data_len);
>  		return -ENOMEM;
>  	}
> 

Thanks!

Best Regards,
Wei