On Thu, Oct 03, 2019 at 10:53:03AM +0200, Geert Uytterhoeven wrote:
> Hi Paul,
>
> On Thu, Oct 3, 2019 at 3:49 AM <[email protected]> wrote:
> > From: "Paul E. McKenney" <[email protected]>
> >
> > New tools bring new warnings, and with v5.3 comes:
>
> According to the kisskb build logs, it happens with gcc 4.6.3 only ;-)
>
> > kernel/rcu/srcutree.c: warning: 'levelspread[<U aa0>]' may be used
> > uninitialized in this function [-Wuninitialized]: => 121:34
> >
> > This commit suppresses this warning by initializing the full array
> > to INT_MIN, which will result in failures should any out-of-bounds
> > references appear.
> >
> > Reported-by: Michael Ellerman <[email protected]>
> > Reported-by: Geert Uytterhoeven <[email protected]>
> > Signed-off-by: Paul E. McKenney <[email protected]>
>
> Thanks for your patch!
>
> Reviewed-by: Geert Uytterhoeven <[email protected]>
> (for the initialization loop, not for the actual INT_MIN value)
Applied, thank you!
> Unfortunately I don't have a gcc-4.6.3 Linux cross-compiler anymore.
> I tried with msp430-gcc-4.6.3 and some hackery to get it to compile,
> but that didn't let me reproduce the warning.
OK, please let me know when gcc-4.6.3 is old enough that this patch
should be reverted. Or just submit the revert at that point, as the
case may be. ;-)
Thanx, Paul
