Re: [PATCH v10 01/16] iommu: Move iommu fault data to linux/iommu.h

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On Thu, Jan 25, 2024 at 09:43:37AM -0400, Jason Gunthorpe wrote:
> On Thu, Jan 25, 2024 at 10:17:34AM +0100, Joel Granados wrote:
> > On Mon, Jan 22, 2024 at 01:42:53PM +0800, Lu Baolu wrote:
> > > The iommu fault data is currently defined in uapi/linux/iommu.h, but is
> > > only used inside the iommu subsystem. Move it to linux/iommu.h, where it
> > > will be more accessible to kernel drivers.
> > > 
> > > With this done, uapi/linux/iommu.h becomes empty and can be removed from
> > > the tree.
> > 
> > The reason for removing this [1] is that it is only being used by
> > internal code in the kernel. What happens with usespace code that have
> > used these definitions? Should we deprecate instead of just removing?
> 
> There was never an in-tree kernel implementation. Any userspace that
> implemented this needs to decide on its own if it will continue to
> support the non-mainline kernel and provide a copy of the definitions
> itself..
> 
> (it was a process mistake to merge a uapi header without a
> corresponding uapi implementation, sorry)
Thx.
This makes sense and its actually a good thing that we remove it.

Best
> 
> Jason

-- 

Joel Granados

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