Several float to int potential rounding errors/inconsistencies

[Linus Torvalds]

On Mon, Mar 6, 2017 at 8:50 PM, Linus Torvalds
<torvalds at linux-foundation.org> wrote:
>
> Ugh, yes. Mainly because it warns even about the "cast rint() to an
> integer" case:

Actually, the correct thing to do is to use lrint(), but my very dim
memory is that this didn't work on Windows.

Dirk (or anybody else with a Windows build), does this build:

    git grep -l '\<rint(' | xargs sed -i 's/rint(/lrint(/g'

it just replaces 'rint()" calls with 'lrint()'.

If it does build, you should just commit it. Otherwise we'd need some
Windows helper macro to implement it, possibly just

   #ifdef WIN32
    #define lrint(x) ((long)rint(x))
   #endif

or similar.

That gets rid of the worst noise, and leaves just real (but admittedly
likely not very important) float->integer conversion warnings.

                Linus