linux-kernel - Re: [PATCH v2 4/8] iio: core: Use min() instead of min

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Message-ID: <20230723101416.398589b3@jic23-huawei>
Date:   Sun, 23 Jul 2023 10:14:16 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lars-Peter Clausen <lars@...afoo.de>,
        Nuno Sa <nuno.sa@...log.com>
Subject: Re: [PATCH v2 4/8] iio: core: Use min() instead of min_t() to make
 code more robust

On Fri, 21 Jul 2023 20:00:18 +0300
Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:

> min() has strict type checking and preferred over min_t() for
> unsigned types to avoid overflow. Here it's unclear why min_t()
> was chosen since both variables are of the same type. In any
> case update to use min().
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Reviewed-by: Nuno Sa <nuno.sa@...log.com>
Applied to the togreg branch of iio.git and pushed out as testing
for 0-day to give it a quick sanity check.

Thanks,

Jonathan

> ---
>  drivers/iio/industrialio-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 6e28c2a3d223..78cc67efa490 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -389,7 +389,7 @@ static ssize_t iio_debugfs_write_reg(struct file *file,
>  	char buf[80];
>  	int ret;
>  
> -	count = min_t(size_t, count, (sizeof(buf)-1));
> +	count = min(count, sizeof(buf) - 1);
>  	if (copy_from_user(buf, userbuf, count))
>  		return -EFAULT;
>