linux-kernel - Re: [PATCH -next] usb: usbip: Use DEFINE

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Message-ID: <de699446-4f00-ce6a-4dfb-1f95669325f1@linuxfoundation.org>
Date:   Fri, 15 Jan 2021 10:57:23 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>,
        valentina.manea.m@...il.com, shuah@...nel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH -next] usb: usbip: Use DEFINE_SPINLOCK() for spinlock

On 12/23/20 7:14 AM, Zheng Yongjun wrote:
> spinlock can be initialized automatically with DEFINE_SPINLOCK()
> rather than explicitly calling spin_lock_init().
> 
> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
> ---
>   drivers/usb/usbip/stub_main.c | 4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c
> index c1c0bbc9f8b1..77a5b3f8736a 100644
> --- a/drivers/usb/usbip/stub_main.c
> +++ b/drivers/usb/usbip/stub_main.c
> @@ -23,7 +23,7 @@ struct kmem_cache *stub_priv_cache;
>    */
>   #define MAX_BUSID 16
>   static struct bus_id_priv busid_table[MAX_BUSID];
> -static spinlock_t busid_table_lock;
> +static DEFINE_SPINLOCK(busid_table_lock);
>   
>   static void init_busid_table(void)
>   {
> @@ -35,8 +35,6 @@ static void init_busid_table(void)
>   	 */
>   	memset(busid_table, 0, sizeof(busid_table));
>   
> -	spin_lock_init(&busid_table_lock);
> -
>   	for (i = 0; i < MAX_BUSID; i++)
>   		spin_lock_init(&busid_table[i].busid_lock);
>   }
> 


Sorry for the delay on this.

Looks good to me.

Acked-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah