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


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


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