linux-kernel - Re: [PATCH][next] platform/x86: thinkpad_acpi: remove redundant assignment to variable i

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Date: Mon, 8 Jan 2024 15:56:43 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Colin Ian King <colin.i.king@...il.com>,
 Henrique de Moraes Holschuh <hmh@....eng.br>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 ibm-acpi-devel@...ts.sourceforge.net, platform-driver-x86@...r.kernel.org
Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] platform/x86: thinkpad_acpi: remove redundant
 assignment to variable i

Hi,

On 1/6/24 16:47, Colin Ian King wrote:
> The variable i is being initialized with the value 0 that is never
> read, it is being re-assigned 0 again in a for-loop statement later
> on. The initialization is redundant and can be removed.
> 
> The initialization of variable n can also be deferred after the
> sanity check on pointer n and the declaration of all the int variables
> can be combined as a final code clear-up.
> 
> Cleans up clang scan build warning:
> warning: Value stored to 'i' is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>  drivers/platform/x86/thinkpad_acpi.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index c4895e9bc714..7bf91cfd3e51 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -6208,17 +6208,15 @@ static int thermal_get_sensor(int idx, s32 *value)
>  
>  static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
>  {
> -	int res, i;
> -	int n;
> -
> -	n = 8;
> -	i = 0;
> +	int res, i, n;
>  
>  	if (!s)
>  		return -EINVAL;
>  
>  	if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
>  		n = 16;
> +	else
> +		n = 8;
>  
>  	for (i = 0 ; i < n; i++) {
>  		res = thermal_get_sensor(i, &s->temp[i]);