linux-kernel - Re: [PATCH net-next 04/11] net: z85230: remove redundant initialization for statics

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Message-ID: <a39c53f5-2b87-22c4-1df2-d92988682362@huawei.com>
Date:   Mon, 14 Jun 2021 18:21:24 +0800
From:   "lipeng (Y)" <lipeng321@...wei.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Guangbin Huang <huangguangbin2@...wei.com>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <xie.he.0141@...il.com>,
        <ms@....tdt.de>, <willemb@...gle.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 04/11] net: z85230: remove redundant
 initialization for statics


在 2021/6/14 0:22, Andrew Lunn 写道:
> On Sun, Jun 13, 2021 at 03:38:16PM +0800, Guangbin Huang wrote:
>> From: Peng Li <lipeng321@...wei.com>
>>
>> Should not initialise statics to 0.
>>
>> Signed-off-by: Peng Li <lipeng321@...wei.com>
>> Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
>> ---
>>   drivers/net/wan/z85230.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/wan/z85230.c b/drivers/net/wan/z85230.c
>> index 94ed9a2..f815bb5 100644
>> --- a/drivers/net/wan/z85230.c
>> +++ b/drivers/net/wan/z85230.c
>> @@ -685,7 +685,7 @@ irqreturn_t z8530_interrupt(int irq, void *dev_id)
>>   {
>>   	struct z8530_dev *dev=dev_id;
>>   	u8 intr;
>> -	static volatile int locker=0;
>> +	static int locker;
> Is the volatile unneeded? Please document that in the commit message.
>
>     Andrew
> .
Hi,  Andrew:

When i create this patch, it will WARNING: Use of volatile is usually 
wrong: see Documentation/process/volatile-considered-harmful.rst
According to the file in kernel: 
Documentation/process/volatile-considered-harmful.rst
the "volatile" type class should not be used.
So i remove  "volatile" in this patch.

I will add the reason in commit log Next version.

Thanks.

Peng Li