Subject: Re: linux-next: build warning after merge of the rcu tree

From: "Paul E. McKenney" <[email-masked]>
Date: Mon, 6 Jan 2020 10:10:06 -0800

On Mon, Jan 06, 2020 at 09:51:47AM -0800, Olof Johansson wrote:
> Hi,
> 
> On Wed, Dec 11, 2019 at 9:06 PM Stephen Rothwell <[email-masked]> wrote:
> >
> > Hi all,
> >
> > After merging the rcu (I think) tree, today's linux-next build (x86_64
> > allnoconfig) produced this warning:
> >
> > kernel/time/timer.c: In function 'schedule_timeout':
> > kernel/time/timer.c:969:20: warning: 'timer.expires' may be used uninitialized in this function [-Wmaybe-uninitialized]
> >   969 |   long diff = timer->expires - expires;
> >       |               ~~~~~^~~~~~~~~
> >
> > Introduced by (bisected to) commit
> >
> >   c4127fce1d02 ("timer: Use hlist_unhashed_lockless() in timer_pending()")
> >
> > x86_64-linux-gnu-gcc (Debian 9.2.1-21) 9.2.1 20191130
> 
> This is still there as of last night's -next. Any update on getting a
> fix queued together with the offending patch?

Hello, Olof,

Thank you, I had indeed lost track of this one.  :-/

Does Eric's patch fix things for you?

https://lore.kernel.org/lkml/[email-masked]/

							Thanx, Paul