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SubjectRe: Provide example copy_in_user implementation

On Tue, 24 Jun 2003, Pavel Machek wrote:
>
> ...so it should be exactly as fast.

No it shouldn't.

You should do the access_ok() only _once_ (well, twice: once for source
and once for dest).

Also, anything that copies memory one byte at a time is just asking to be
shot.

Linus

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