Re: linux-next: build failure after merge of the rdma tree
From: Changbin Du
Date: Sun Dec 09 2018 - 19:44:03 EST
On Thu, Dec 06, 2018 at 09:58:15AM +1100, Stephen Rothwell wrote:
> Hi Guy,
> On Wed, 5 Dec 2018 12:25:57 +0000 "Guy Levi(SW)" <guyle@xxxxxxxxxxxx> wrote:
> > >
> > > Huh. So apparently every compiler that tested this patch (0-day, mine,
> > > the submitters) optimized this call away because is_atomic_response()
> > > always returns 0: meaning mlx5_get_atomic_laddr is never callable and
> > > can be deleted entirely, including the call to mlx5_get_send_wqe.
> > >
> > > Not sure what compiler setup will hit this, but it is clearly wrong
> > > code..
> > Flag -o0 ?
> No, but the kbuild tree contains a change that allows turning off of
> gcc's autoinlining and the CONFIG option guarding that gets turned on
> for allmodconfig builds among others.
Let me turn it off to pass allmodconfig build. it is a pure debug
> Masahiro, should CONFIG_NO_AUTO_INLINE maybe need to be off unless
> explicitly enabled (like CONFIG_DEBUG_INFO and others)?
> Stephen Rothwell