Re: [PATCH 0/10] IOMMU: Make iommu_ops per-bus_type

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On Wed, Sep 07, 2011 at 05:41:43PM +0200, Joerg Roedel wrote:
> Hi,
> 
> here is the new version of the patch-set to make the iommu_ops used in
> the iommu-api a bus_type property. This will allow us to move code out
> of the iommu drivers into generic code and it simplifies the
> implementation of the Alex' device-group property.
> 
> Greg, can you have a look at patch 2 please and tell me if you have any
> objections?

I object, please see my comments.

> With this version the patch-set is complete (not as the first RFC post).
> It converts all iommu drivers to use the new registration interface and
> completly removes the register_iommu interface.
> 
> Regards,
> 
> 	Joerg
> 
> Diffstat:
> 
>  arch/ia64/kvm/kvm-ia64.c           |    3 +-
>  arch/x86/kvm/x86.c                 |    3 +-
>  drivers/base/bus.c                 |   16 ++++++++++
>  drivers/iommu/amd_iommu.c          |    2 +-
>  drivers/iommu/intel-iommu.c        |    2 +-
>  drivers/iommu/iommu.c              |   58 ++++++++++++++++++++++++------------
>  drivers/iommu/msm_iommu.c          |    2 +-
>  drivers/iommu/omap-iommu.c         |    2 +-
>  drivers/media/video/omap3isp/isp.c |    2 +-
>  include/linux/device.h             |    9 +++++
>  include/linux/iommu.h              |   21 +++++++------
>  virt/kvm/iommu.c                   |    4 +-
>  12 files changed, 86 insertions(+), 38 deletions(-)

So the overall work here makes for more code, right?  I fail to see the
benifit, what am I missing?

greg k-h
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