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

[Linus Torvalds]

On Tue, 17 Jun 2008, Andi Kleen wrote:
> 
> Linus seems to think that copy_to_user() should have
> copy_in_user semantics().

No. 

I *know* that copy_to/from_user() is supposed to return the number of 
bytes not copied.

And if you loaded a value but didn't store it to the destination, then BY 
DEFINITION you didn't copy it.

Comprende?

Obviously you don't.

Gaah. Why do I keep bothering to even _try_ to educate you? Can't you 
accept that I just fixed a bug, which had a test-case an everything?

Andi, really. Take it from me. If I tell you something, I'm usually right. 
Think about that for a moment, instead of living in your own little 
dream-world where you think you understand everything.

		Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/