linux-kernel - Re: [PATCH 3/6] PCI/VGA: drop the inline of vga_update_device

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Date:   Mon, 24 Jul 2023 21:02:31 +0800
From:   suijingfeng <suijingfeng@...ngson.cn>
To:     Sui Jingfeng <sui.jingfeng@...ux.dev>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH 3/6] PCI/VGA: drop the inline of
 vga_update_device_decodes() function

PING, please !

On 2023/7/11 21:43, Sui Jingfeng wrote:
> From: Sui Jingfeng <suijingfeng@...ngson.cn>
>
> The vga_update_device_decodes() function is NOT a trivial function, It is
> not performance critical either. So, drop the inline.
>
> This patch also make the parameter and argument consistent, use unsigned
> int type instead of the signed type to store the decode. Change the second
> argument of vga_update_device_decodes() function as 'unsigned int' type.
>
> Signed-off-by: Sui Jingfeng <suijingfeng@...ngson.cn>
> ---
>   drivers/pci/vgaarb.c | 24 ++++++++++++------------
>   1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c
> index 021116ed61cb..668139f7c247 100644
> --- a/drivers/pci/vgaarb.c
> +++ b/drivers/pci/vgaarb.c
> @@ -860,24 +860,24 @@ static bool vga_arbiter_del_pci_device(struct pci_dev *pdev)
>   	return ret;
>   }
>   
> -/* this is called with the lock */
> -static inline void vga_update_device_decodes(struct vga_device *vgadev,
> -					     int new_decodes)
> +/* This is called with the lock */
> +static void vga_update_device_decodes(struct vga_device *vgadev,
> +				      unsigned int new_decodes)
>   {
>   	struct device *dev = &vgadev->pdev->dev;
> -	int old_decodes, decodes_removed, decodes_unlocked;
> +	unsigned int old_decodes = vgadev->decodes;
> +	unsigned int decodes_removed = ~new_decodes & old_decodes;
> +	unsigned int decodes_unlocked = vgadev->locks & decodes_removed;
>   
> -	old_decodes = vgadev->decodes;
> -	decodes_removed = ~new_decodes & old_decodes;
> -	decodes_unlocked = vgadev->locks & decodes_removed;
>   	vgadev->decodes = new_decodes;
>   
> -	vgaarb_info(dev, "changed VGA decodes: olddecodes=%s,decodes=%s:owns=%s\n",
> -		vga_iostate_to_str(old_decodes),
> -		vga_iostate_to_str(vgadev->decodes),
> -		vga_iostate_to_str(vgadev->owns));
> +	vgaarb_info(dev,
> +		    "VGA decodes changed: olddecodes=%s,decodes=%s:owns=%s\n",
> +		    vga_iostate_to_str(old_decodes),
> +		    vga_iostate_to_str(vgadev->decodes),
> +		    vga_iostate_to_str(vgadev->owns));
>   
> -	/* if we removed locked decodes, lock count goes to zero, and release */
> +	/* If we removed locked decodes, lock count goes to zero, and release */
>   	if (decodes_unlocked) {
>   		if (decodes_unlocked & VGA_RSRC_LEGACY_IO)
>   			vgadev->io_lock_cnt = 0;