Re: [PATCH 02/10] Driver core: Add iommu_ops to bus_type

[Greg KH <gregkh@suse.de>]

On Thu, Sep 22, 2011 at 06:14:54PM +0200, Joerg Roedel wrote:
> This is the starting point to make the iommu_ops used for
> the iommu-api a per-bus-type structure. It is required to
> easily implement bus-specific setup in the iommu-layer.
> The first user will be the iommu-group attribute in sysfs.
> 
> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
> ---
>  drivers/base/bus.c     |   29 +++++++++++++++++++++++++++++
>  drivers/iommu/iommu.c  |    4 ++++
>  include/linux/device.h |   10 ++++++++++
>  include/linux/iommu.h  |    2 ++
>  4 files changed, 45 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/base/bus.c b/drivers/base/bus.c
> index 000e7b2..b3014fe 100644
> --- a/drivers/base/bus.c
> +++ b/drivers/base/bus.c
> @@ -1028,6 +1028,35 @@ void bus_sort_breadthfirst(struct bus_type *bus,
>  }
>  EXPORT_SYMBOL_GPL(bus_sort_breadthfirst);
>  
> +#ifdef CONFIG_IOMMU_API
> +/**

This ifdef really isn't needed, is it?  I think you can remove it.

Other than that, looks much better, thanks.

greg k-h