linux-kernel - Re: [PATCH -next] fpga: Use DEFINE

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Date:   Sat, 9 Jan 2021 14:08:53 -0800
From:   Tom Rix <trix@...hat.com>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>, mdf@...nel.org,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] fpga: Use DEFINE_SPINLOCK() for spinlock


On 12/28/20 5:51 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>

This looks fine.

Reviewed-by: Tom Rix <trix@...hat.com>

> ---
>  drivers/fpga/fpga-bridge.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
> index 2deccacc3aa7..e9266b2a357f 100644
> --- a/drivers/fpga/fpga-bridge.c
> +++ b/drivers/fpga/fpga-bridge.c
> @@ -17,7 +17,7 @@ static DEFINE_IDA(fpga_bridge_ida);
>  static struct class *fpga_bridge_class;
>  
>  /* Lock for adding/removing bridges to linked lists*/
> -static spinlock_t bridge_list_lock;
> +static DEFINE_SPINLOCK(bridge_list_lock);
>  
>  /**
>   * fpga_bridge_enable - Enable transactions on the bridge
> @@ -479,8 +479,6 @@ static void fpga_bridge_dev_release(struct device *dev)
>  
>  static int __init fpga_bridge_dev_init(void)
>  {
> -	spin_lock_init(&bridge_list_lock);
> -
>  	fpga_bridge_class = class_create(THIS_MODULE, "fpga_bridge");
>  	if (IS_ERR(fpga_bridge_class))
>  		return PTR_ERR(fpga_bridge_class);