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From:   Olof Johansson <olof@lixom.net>
Date:   Mon, 6 Jan 2020 09:51:47 -0800
Message-ID: <CAOesGMiabP7nAPYKrmP=j_8bSj-UfUSFoiD0W+kqzaBp-6J2hQ@mail.gmail.com>
Subject: Re: linux-next: build warning after merge of the rcu tree
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     "Paul E. McKenney" <paulmck@kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Eric Dumazet <edumazet@google.com>
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Hi,

On Wed, Dec 11, 2019 at 9:06 PM Stephen Rothwell <sfr@canb.auug.org.au> 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?


Thanks!

-Olof