netdev - Re: [PATCH 1/1 linux-next] ath5k: use swap() in ath5k_hw_get_median_noise

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Date:	Wed, 10 Jun 2015 12:52:46 -0700
From:	Joe Perches <joe@...ches.com>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel@...r.kernel.org, Julia Lawall <Julia.Lawall@...6.fr>,
	Jiri Slaby <jirislaby@...il.com>,
	Nick Kossifidis <mickflemm@...il.com>,
	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	Kalle Valo <kvalo@...eaurora.org>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/1 linux-next] ath5k: use swap() in
 ath5k_hw_get_median_noise_floor()

On Wed, 2015-06-10 at 18:33 +0200, Fabian Frederick wrote:
> Use kernel.h macro definition.
> 
> Thanks to Julia Lawall for Coccinelle scripting support.
[]
> diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c
[]
> @@ -1566,17 +1566,13 @@ static s16
>  ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
>  {
>  	s16 sort[ATH5K_NF_CAL_HIST_MAX];
> -	s16 tmp;
>  	int i, j;
>  
>  	memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort));
>  	for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) {
>  		for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) {
> -			if (sort[j] > sort[j - 1]) {
> -				tmp = sort[j];
> -				sort[j] = sort[j - 1];
> -				sort[j - 1] = tmp;
> -			}
> +			if (sort[j] > sort[j - 1])
> +				swap(sort[j], sort[j]);

swap(a, a) doesn't look useful.


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