linux-kernel - Re: [PATCH 3/6] staging: rtl8723bs: fix indentation

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Date:   Sun, 8 Jul 2018 19:36:13 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     Joe Perches <joe@...ches.com>, gregkh@...uxfoundation.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] staging: rtl8723bs: fix indentation

On 07/08/18 18:46, Joe Perches wrote:
> On Sun, 2018-07-08 at 12:38 +0200, Michael Straube wrote:
>> Remove unrequired extra indentations.
> []
>> diff --git a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
> []
>> @@ -69,16 +69,16 @@ int rtw_get_bit_value_from_ieee_value(u8 val)
>>   
>>   uint rtw_is_cckrates_included(u8 *rate)
>>   {
>> -		u32 i = 0;
>> +	u32 i = 0;
>>   
>> -		while (rate[i] !=  0) {
>> -			if  ((((rate[i]) & 0x7f) == 2)	|| (((rate[i]) & 0x7f) == 4) ||
>> -			     (((rate[i]) & 0x7f) == 11)  || (((rate[i]) & 0x7f) == 22))
>> -				return true;
>> -			i++;
>> -		}
>> +	while (rate[i] !=  0) {
>> +		if  ((((rate[i]) & 0x7f) == 2)	|| (((rate[i]) & 0x7f) == 4) ||
>> +		     (((rate[i]) & 0x7f) == 11)  || (((rate[i]) & 0x7f) == 22))
>> +			return true;
>> +		i++;
>> +	}
>>   
>> -		return false;
>> +	return false;
>>   }
> 
> Hi Michael.
> 
> Please try to improve the code for human readers and/or
> reduce overall object size over merely shutting up checkpatch
> style warnings.
> 

Hi Joe,

I agree that it's better to improve the code than just silence
warnings.

Thanks for your advice.

> For instance:
> 
> You could reduce object size a little by eliminating the
> multiple use of 0x7f and index and dereferencing the
> pointer instead.
> 
> $ size drivers/staging/rtl8723bs/core/rtw_ieee80211.o*
>     text	   data	    bss	    dec	    hex	filename
>    10085	     76	      0	  10161	   27b1	drivers/staging/rtl8723bs/core/rtw_ieee80211.o.new
>    10149	     76	      0	  10225	   27f1	drivers/staging/rtl8723bs/core/rtw_ieee80211.o.old
> 
> Something like:
> 
> uint rtw_is_cckrates_included(u8 *rate)
> {
> 	while (*rate) {
> 		u8 r = *rate & 0x7f;
> 
> 		if (r == 2 || r == 4 || r == 11 || r == 22)
> 			return true;
> 		rate++;
> 	}
> 
> 	return false;
> }
> 
> uint rtw_is_cckratesonly_included(u8 *rate)
> {
> 	while (*rate) {
> 		u8 r = *rate & 0x7f;
> 
> 		if (r != 2 && r != 4 && r != 11 && r != 22)
> 			return false;
> 		rate++;
> 	}
> 
> 	return true;
> }
> 

The patch has been added to staging-testing already.
I will send patches with your suggestions the next days.

Thanks again.

Michael