linux-kernel - Re: [PATCH v2 2/2] PCI/sysfs: use NUMA_NO

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Date:   Mon, 4 Oct 2021 03:45:26 +0200
From:   Krzysztof Wilczyński <kw@...ux.com>
To:     Max Gurtovoy <mgurtovoy@...dia.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>, gregkh@...uxfoundation.org,
        hch@...radead.org, stefanha@...hat.com, oren@...dia.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] PCI/sysfs: use NUMA_NO_NODE macro

[+cc Bjorn as he has strong code formatting preference in the PCI tree]

Hi Max,

> Use the proper macro instead of hard-coded (-1) value.
> 
> Suggested-by: Krzysztof Wilczyński <kw@...ux.com>
> Signed-off-by: Max Gurtovoy <mgurtovoy@...dia.com>

Thank you for taking care of this!  Much appreciated!

> ---
>  drivers/pci/pci-sysfs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
> index 7fb5cd17cc98..b21065222c87 100644
> --- a/drivers/pci/pci-sysfs.c
> +++ b/drivers/pci/pci-sysfs.c
> @@ -81,8 +81,8 @@ static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list,
>  	const struct cpumask *mask;
>  
>  #ifdef CONFIG_NUMA
> -	mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
> -					  cpumask_of_node(dev_to_node(dev));
> +	mask = (dev_to_node(dev) == NUMA_NO_NODE) ? cpu_online_mask :
> +				cpumask_of_node(dev_to_node(dev));

Oh this somewhat awkward indentation we have with this ternary now,
and so I wonder if either:

	mask = (dev_to_node(dev) == NUMA_NO_NODE) ?
		cpu_online_mask : cpumask_of_node(dev_to_node(dev));

Or, perhaps (yes, a few more lines):

	if (dev_to_node(dev) == NUMA_NO_NODE)
		mask = cpu_online_mask;
	else
		mask = cpumask_of_node(node);

Would be easier on the eyes, so to speak.  What do you think (not a problem
if you don't want to change anything, thoguh)?

Thank you!

Reviewed-by: Krzysztof Wilczyński <kw@...ux.com>

	Krzysztof