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SubjectRe: ioctl cleanups: move SG_IO translation where it belongs

> > This enables sharing of 200 lines of SG_IO support by all 64-bit
> > architectures. If it looks okay, more such patches will follow.
> I currently have some patches for this function pending. When an
> unchanged data buffer is passed it is ok to just verify_area it, no need
> to kmalloc and copy. This simplifies this handler vastly.
> Here is the part from the 2.4 patch; haven't tried it with 2.5 yet,
> but should apply there too.
> Also adds some boundary checking.

I'll merge it. Can you mail me whole 2.4 patch [I had it but deleted
it, sorry]. I'll attempt to port it to 2.5 and return it back to

When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
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