linux-kernel - Re: [PATCH] iwlwifi: pcie: make array 'prop' static, shrinks object size

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Date:   Tue, 04 Sep 2018 09:07:47 +0300
From:   Luciano Coelho <luciano.coelho@...el.com>
To:     Colin King <colin.king@...onical.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: pcie: make array 'prop' static, shrinks object
 size

On Tue, 2018-08-21 at 11:21 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Don't populate the array prop on the stack but instead make it static.
> Makes the object code smaller by 30 bytes:
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>   80138	  15382	    576	  96096	  17760	drivers/net/wireless/intel/iwlwifi/pcie/trans.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>   79948	  15542	    576	  96066	  17742	drivers/net/wireless/intel/iwlwifi/pcie/trans.o
> 
> (gcc version 8.2.0 x86_64)
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
> index 7d319b6863fe..c7daf666ee21 100644
> --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
> +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
> @@ -1947,7 +1947,7 @@ static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
>  	struct iwl_trans_pcie_removal *removal =
>  		container_of(wk, struct iwl_trans_pcie_removal, work);
>  	struct pci_dev *pdev = removal->pdev;
> -	char *prop[] = {"EVENT=INACCESSIBLE", NULL};
> +	static char *prop[] = {"EVENT=INACCESSIBLE", NULL};
>  
>  	dev_err(&pdev->dev, "Device gone - attempting removal\n");
>  	kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);

Thanks! I pushed this to our internal tree and it will reach upstream
following our normal process.

--
Luca.