Patchwork [v2] cpufreq: highbank: do not initialize array with a loop

login
register
mail settings
Submitter Emilio López
Date Feb. 25, 2013, 11:07 a.m.
Message ID <1361790465-21760-1-git-send-email-emilio@elopez.com.ar>
Download mbox | patch
Permalink /patch/222909/
State New
Headers show

Comments

Emilio López - Feb. 25, 2013, 11:07 a.m.
As uninitialized array members will be initialized to zero, we can
avoid using a for loop by setting a value to it.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
---

Note that I don't own any device using this driver, it has only been compile
tested, but it shouldn't cause any issues.

Changes v1 -> v2:
  * Move freq / 1000000 to the array definition as suggested by Viresh Kumar

 drivers/cpufreq/highbank-cpufreq.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)
viresh kumar - Feb. 25, 2013, 11:12 a.m.
On Mon, Feb 25, 2013 at 4:37 PM, Emilio López <emilio@elopez.com.ar> wrote:
> As uninitialized array members will be initialized to zero, we can
> avoid using a for loop by setting a value to it.
>
> Signed-off-by: Emilio López <emilio@elopez.com.ar>
> ---
>
> Note that I don't own any device using this driver, it has only been compile
> tested, but it shouldn't cause any issues.
>
> Changes v1 -> v2:
>   * Move freq / 1000000 to the array definition as suggested by Viresh Kumar
>
>  drivers/cpufreq/highbank-cpufreq.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c
> index 66e3a71..b61b5a3 100644
> --- a/drivers/cpufreq/highbank-cpufreq.c
> +++ b/drivers/cpufreq/highbank-cpufreq.c
> @@ -28,13 +28,7 @@
>
>  static int hb_voltage_change(unsigned int freq)
>  {
> -       int i;
> -       u32 msg[HB_CPUFREQ_IPC_LEN];
> -
> -       msg[0] = HB_CPUFREQ_CHANGE_NOTE;
> -       msg[1] = freq / 1000000;
> -       for (i = 2; i < HB_CPUFREQ_IPC_LEN; i++)
> -               msg[i] = 0;
> +       u32 msg[HB_CPUFREQ_IPC_LEN] = {HB_CPUFREQ_CHANGE_NOTE, freq / 1000000};

If you haven't crossed 80 width:

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

>
>         return pl320_ipc_transmit(msg);
>  }
Mark Langsdorf - Feb. 25, 2013, 1:53 p.m.
On 02/25/2013 05:07 AM, Emilio López wrote:
> As uninitialized array members will be initialized to zero, we can
> avoid using a for loop by setting a value to it.
> 
> Signed-off-by: Emilio López <emilio@elopez.com.ar>
> ---
> 
> Note that I don't own any device using this driver, it has only been compile
> tested, but it shouldn't cause any issues.
> 
> Changes v1 -> v2:
>   * Move freq / 1000000 to the array definition as suggested by Viresh Kumar
> 
>  drivers/cpufreq/highbank-cpufreq.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c
> index 66e3a71..b61b5a3 100644
> --- a/drivers/cpufreq/highbank-cpufreq.c
> +++ b/drivers/cpufreq/highbank-cpufreq.c
> @@ -28,13 +28,7 @@
>  
>  static int hb_voltage_change(unsigned int freq)
>  {
> -	int i;
> -	u32 msg[HB_CPUFREQ_IPC_LEN];
> -
> -	msg[0] = HB_CPUFREQ_CHANGE_NOTE;
> -	msg[1] = freq / 1000000;
> -	for (i = 2; i < HB_CPUFREQ_IPC_LEN; i++)
> -		msg[i] = 0;
> +	u32 msg[HB_CPUFREQ_IPC_LEN] = {HB_CPUFREQ_CHANGE_NOTE, freq / 1000000};
>  
>  	return pl320_ipc_transmit(msg);
>  }
> 
Thanks for the improvement.

Acked-By: Mark Langsdorf <mark.langsdorf@calxeda.com>

--Mark Langsdorf
Calxeda, Inc.

Patch

diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c
index 66e3a71..b61b5a3 100644
--- a/drivers/cpufreq/highbank-cpufreq.c
+++ b/drivers/cpufreq/highbank-cpufreq.c
@@ -28,13 +28,7 @@ 
 
 static int hb_voltage_change(unsigned int freq)
 {
-	int i;
-	u32 msg[HB_CPUFREQ_IPC_LEN];
-
-	msg[0] = HB_CPUFREQ_CHANGE_NOTE;
-	msg[1] = freq / 1000000;
-	for (i = 2; i < HB_CPUFREQ_IPC_LEN; i++)
-		msg[i] = 0;
+	u32 msg[HB_CPUFREQ_IPC_LEN] = {HB_CPUFREQ_CHANGE_NOTE, freq / 1000000};
 
 	return pl320_ipc_transmit(msg);
 }