linux-kernel - Re: [PATCH v8 1/5] vfio/migration: Add debugfs to live migration driver

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Date:   Fri, 10 Mar 2023 13:12:56 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Longfang Liu <liulongfang@...wei.com>
Cc:     alex.williamson@...hat.com, shameerali.kolothum.thodi@...wei.com,
        jonathan.cameron@...wei.com, cohuck@...hat.com,
        linux-kernel@...r.kernel.org, linuxarm@...neuler.org
Subject: Re: [PATCH v8 1/5] vfio/migration: Add debugfs to live migration
 driver

On Fri, Feb 17, 2023 at 04:48:27PM +0800, Longfang Liu wrote:
> +void vfio_vf_debugfs_init(struct vfio_device *vdev)
> +{
> +	struct device *dev = &vdev->device;
> +
> +	vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev), vfio_debugfs_root);
> +
> +	debugfs_create_devm_seqfile(dev, "migration_state", vdev->debug_root,
> +				  vfio_vf_state_read);
> +}
> +EXPORT_SYMBOL_GPL(vfio_vf_debugfs_init);
> +
> +void vfio_vf_debugfs_exit(struct vfio_device *vdev)
> +{
> +	debugfs_remove_recursive(vdev->debug_root);
> +}
> +EXPORT_SYMBOL_GPL(vfio_vf_debugfs_exit);
> +
> +void  vfio_debugfs_create_root(void)
> +{
> +	vfio_debugfs_root = debugfs_create_dir("vfio", NULL);
> +}
> +EXPORT_SYMBOL_GPL(vfio_debugfs_create_root);
> +
> +void  vfio_debugfs_remove_root(void)
> +{
> +	debugfs_remove_recursive(vfio_debugfs_root);
> +	vfio_debugfs_root = NULL;
> +}
> +EXPORT_SYMBOL_GPL(vfio_debugfs_remove_root);

Why are these symbols exported?

Jason