Re: [PATCH] Kbuild: Move -Wmaybe-uninitialized to W=1

[Linus Torvalds]

On Thu, Jul 28, 2016 at 12:03 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Once we get to the point that the warning is no longer useful, and is
> more pain than gain, it gets disabled.

Btw, I have a suspicion that you didn't realize that
"-Wmaybe-uninitialized" is separate from "-Wuninitialized" (which is
*not* disabled).

The "maybe-uninitialized" warning is literally gcc saying "I haven't
really followed all the logic, but from my broken understanding it
isn't _obvious_ that it is initialized".

And the problem is that a lot of gcc optimization choices basically
move the pointer of "obvious". So the warning is a bit random to begin
with. And when the gcc people screw thigns up, things go to hell in a
handbasket.

             Linus