linux-kernel - Re: [PATCH 3/8] vfio: add external user support

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Date:	Thu, 27 Jun 2013 16:47:52 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org,
	linux-doc@...r.kernel.org, Alexander Graf <agraf@...e.de>,
	kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alex Williamson <alex.williamson@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Gibson <david@...son.dropbear.id.au>
Subject: Re: [PATCH 3/8] vfio: add external user support

Hi Alexy,

On Thu, 27 Jun 2013 15:02:31 +1000 Alexey Kardashevskiy <aik@...abs.ru> wrote:
>
> index c488da5..54192b2 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -1370,6 +1370,59 @@ static const struct file_operations vfio_device_fops = {
>  };
>  
>  /**
> + * External user API, exported by symbols to be linked dynamically.
> + */
> +
> +/* Allows an external user (for example, KVM) to lock an IOMMU group */
> +static int vfio_group_add_external_user(struct file *filep)
> +{
> +	struct vfio_group *group = filep->private_data;
> +
> +	if (filep->f_op != &vfio_group_fops)
> +		return -EINVAL;
> +
> +	if (!atomic_inc_not_zero(&group->container_users))
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(vfio_group_add_external_user);

You cannot EXPORT a static symbol ... The same through the rest of the
file.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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