linux-kernel - Re: [PATCH v2 1/1] of: to support binding numa node to specified device in devicetree

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Date:	Thu, 10 Sep 2015 19:28:32 +0800
From:	"Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	devicetree <devicetree@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
CC:	Zefan Li <lizefan@...wei.com>, Xinwei Hu <huxinwei@...wei.com>,
	"Tianhong Ding" <dingtianhong@...wei.com>,
	Hanjun Guo <guohanjun@...wei.com>
Subject: Re: [PATCH v2 1/1] of: to support binding numa node to specified
 device in devicetree

Hi all,

Can somebody take a few moments to review it? This patch is
too small, only changed two lines.

Thanks,
Thunder.

On 2015/8/25 12:08, Zhen Lei wrote:
> For now, in function device_add, the new device will be forced to
> inherit the numa node of its parent. But this will override the device's
> numa node which configured in devicetree.
> 
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>  drivers/base/core.c |  2 +-
>  drivers/of/device.c | 11 ++++++-----
>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index dafae6d..e06de82 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -1017,7 +1017,7 @@ int device_add(struct device *dev)
>  		dev->kobj.parent = kobj;
> 
>  	/* use parent numa_node */
> -	if (parent)
> +	if (parent && (dev_to_node(dev) == NUMA_NO_NODE))
>  		set_dev_node(dev, dev_to_node(parent));
> 
>  	/* first, register with generic layer. */
> diff --git a/drivers/of/device.c b/drivers/of/device.c
> index 8b91ea2..e5f47ce 100644
> --- a/drivers/of/device.c
> +++ b/drivers/of/device.c
> @@ -60,11 +60,12 @@ int of_device_add(struct platform_device *ofdev)
>  	ofdev->name = dev_name(&ofdev->dev);
>  	ofdev->id = -1;
> 
> -	/* device_add will assume that this device is on the same node as
> -	 * the parent. If there is no parent defined, set the node
> -	 * explicitly */
> -	if (!ofdev->dev.parent)
> -		set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
> +	/*
> +	 * If this device has not binding numa node in devicetree, that is
> +	 * of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
> +	 * device is on the same node as the parent.
> +	 */
> +	set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
> 
>  	return device_add(&ofdev->dev);
>  }
> --
> 2.5.0
> 
> 
> 
> .
> 

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