Re: [PATCH] perf/x86/amd/uncore: fix error codes in amd_uncore_init()

[Uros Bizjak]

On Fri, Oct 13, 2023 at 11:06 AM Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
>
> * Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
>
> > On Fri, Oct 13, 2023 at 09:30:46AM +0200, Ingo Molnar wrote:
> >
> > > Ugh, why on Earth didn't GCC warn about this? The bad pattern is pretty
> > > simple & obvious once pointed out ... compilers should have no trouble
> > > realizing that 'ret' is returned uninitialized in some of these control
> > > paths. Yet not a peep from the compiler ...
> >
> > We disabled that warning years ago (5?) because GCC had too many false
> > positives.
>
> GCC had some pretty bogus notions about 'possible' uninitialized use that
> encouraged some bad code patterns, but in this case there's readily
> provable uninitialized use, that a compiler should warn about.
>
> Is it possible to disable just the unreliable, probabilistic part of GCC's
> uninitialized variables warnings?

-Wno-maybe-uninitialized?

Uros.