On Fri, Jun 05, 2020 at 07:36:02AM -0700, Kees Cook wrote:
> On Fri, Jun 05, 2020 at 10:38:55AM +0200, Peter Zijlstra wrote:
> > On Fri, Jun 05, 2020 at 11:52:13AM +1000, Stephen Rothwell wrote:
> > > Commit
> > >
> > > a148866489fb ("sched: Replace rq::wake_list")
> > >
> > > added
> > >
> > > BUILD_BUG_ON(offsetof(struct task_struct, wake_entry_type) - offsetof(struct task_struct, wake_entry) !=
> > > offsetof(struct __call_single_data, flags) - offsetof(struct __call_single_data, llist));
> > >
> > > in kernel/smp.c. This seems to be failing - at least for gcc-8 (I
> > > haven't seen any failures in my linux-next testing).
> >
> > CONFIG_GCC_PLUGIN_RANDSTRUCT=y
>
> (FWIW, the plugins will only be enabled if the gcc plugins-dev package is
> installed)
Which I hadn't, which is why I'd never seen it. I have now.
> > working on it.
>
> Either of these solutions should fix it. I'm not sure which is
> preferred.
I posted in another thread that had earlier raised the issue:
https://lkml.kernel.org/r/20200605093704.GB2948@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
