Re: BUG: mmapfile/writev spurious zero bytes (x86_64/not i386,bisected, reproducable)

[Linus Torvalds]

On Tue, 17 Jun 2008, Linus Torvalds wrote:
> 
> It is "copy_user". Notice the lack of "from" or "to". That code handles 
> *both* copy_to_user and copy_from_user.

Oh, and yes, I said "copy_to_user_inatomic()" by mistake. The fact is that 
"write()" obviously does copy_from_user, but more importantly that on x86 
it's THE EXACT SAME ROUTINE. 

			Linus
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