linux-kernel - Re: [PATCH -next] pci: hotplug: Use DEFINE

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Date:   Wed, 6 Jan 2021 13:08:06 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        bhelgaas@...gle.com
Subject: Re: [PATCH -next] pci: hotplug: Use DEFINE_SPINLOCK() for spinlock

On Mon, Dec 28, 2020 at 09:50:38PM +0800, Zheng Yongjun wrote:
> spinlock can be initialized automatically with DEFINE_SPINLOCK()
> rather than explicitly calling spin_lock_init().

See this again:

https://lore.kernel.org/r/20171026223701.GA25649@bhelgaas-glaptop.roam.corp.google.com

> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
> ---
>  drivers/pci/hotplug/cpqphp_nvram.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/hotplug/cpqphp_nvram.c b/drivers/pci/hotplug/cpqphp_nvram.c
> index 00cd2b43364f..7a65d427ac11 100644
> --- a/drivers/pci/hotplug/cpqphp_nvram.c
> +++ b/drivers/pci/hotplug/cpqphp_nvram.c
> @@ -80,7 +80,7 @@ static u8 evbuffer[1024];
>  static void __iomem *compaq_int15_entry_point;
>  
>  /* lock for ordering int15_bios_call() */
> -static spinlock_t int15_lock;
> +static DEFINE_SPINLOCK(int15_lock);
>  
>  
>  /* This is a series of function that deals with
> @@ -415,9 +415,6 @@ void compaq_nvram_init(void __iomem *rom_start)
>  		compaq_int15_entry_point = (rom_start + ROM_INT15_PHY_ADDR - ROM_PHY_ADDR);
>  
>  	dbg("int15 entry  = %p\n", compaq_int15_entry_point);
> -
> -	/* initialize our int15 lock */
> -	spin_lock_init(&int15_lock);
>  }
>  
>  
> -- 
> 2.22.0
>