netdev - Re: [PATCH] net: hamradio: remove unused variable

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Message-ID: <89a40f827d9557141707b87a86533593@agner.ch>
Date:   Sun, 17 Jun 2018 20:57:38 +0200
From:   Stefan Agner <stefan@...er.ch>
To:     Joe Perches <joe@...ches.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: hamradio: remove unused variable

On 17.06.2018 20:15, Joe Perches wrote:
> On Sun, 2018-06-17 at 15:03 +0200, Stefan Agner wrote:
>> The array bpq_eth_addr is only used to get the size of an
>> address. Remove the array and use the size of the array
>> bcast_addr which is actually copied.
>>
>> Also constify and tidy up the bcast_addr declaration.
>>
>> This fixes a warning seen with clang:
>> drivers/net/hamradio/bpqether.c:94:13: warning: variable 'bpq_eth_addr' is not
>>       needed and will not be emitted [-Wunneeded-internal-declaration]
>> static char bpq_eth_addr[6];
>>             ^
>> 1 warning generated.
>>
>> Signed-off-by: Stefan Agner <stefan@...er.ch>
>> ---
>>  drivers/net/hamradio/bpqether.c | 8 +++-----
>>  1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
>> index f347fd9c5b28..8c9c9977241e 100644
>> --- a/drivers/net/hamradio/bpqether.c
>> +++ b/drivers/net/hamradio/bpqether.c
>> @@ -89,9 +89,7 @@
>>  static const char banner[] __initconst = KERN_INFO \
>>  	"AX.25: bpqether driver version 004\n";
>>
>> -static char bcast_addr[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
>> -
>> -static char bpq_eth_addr[6];
>> +static const char bcast_addr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
>>
>>  static int bpq_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
>>  static int bpq_device_event(struct notifier_block *, unsigned long, void *);
>> @@ -501,8 +499,8 @@ static int bpq_new_device(struct net_device *edev)
>>  	bpq->ethdev = edev;
>>  	bpq->axdev = ndev;
>>
>> -	memcpy(bpq->dest_addr, bcast_addr, sizeof(bpq_eth_addr));
>> -	memcpy(bpq->acpt_addr, bcast_addr, sizeof(bpq_eth_addr));
>> +	memcpy(bpq->dest_addr, bcast_addr, sizeof(bcast_addr));
>> +	memcpy(bpq->acpt_addr, bcast_addr, sizeof(bcast_addr));
> 
> Probably better to remove bcast_addr altogether and use
> 
> 	eth_broadcast_addr(bpq->dst_addr);
> 	eth_broadcast_addr(bpq->acpt_addr);
> 

Sounds sensible, will send a v2.

--
Stefan

> 
>>
>>  	err = register_netdevice(ndev);
>>  	if (err)