Re: [RFC v2 1/2] compiler: use compiler to detect integer overflows

[Linus Torvalds]

On Sat, Nov 29, 2014 at 7:07 AM, Sasha Levin <sasha.levin@xxxxxxxxxx> wrote:
>
> Since we can't just change those to unsigned

Sure we can. Just cast them. A signed start/len is bogus crap, it's a
random wrong type.

If you want to, add a "if (len < 0) return -EINVAL;" before the cast,
but treating negative numbers as big positive numbers sounds fine too.

> we'd still need to do an overflow
> check with signed integers somewhere.

Why? It's just a type. User space can't care, and signed values make
no sense anyway.

                 Linus
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