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    SubjectRe: [PATCH -tip 0/2] Temporary RCU fixes for notrace and hotplug CPU
    On Tue, Aug 25, 2009 at 08:19:07PM +0200, Ingo Molnar wrote:
    >
    > * Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:
    >
    > > On Tue, Aug 25, 2009 at 08:55:01AM +0200, Ingo Molnar wrote:
    > > >
    > > > FYI, -tip testing found a new build warning on SH caused by the RCU
    > > > tree (i suspect this warning triggers on other architectures as
    > > > well):
    > > >
    > > > /home/mingo/tip/kernel/rcutree.c:88: warning: '__rcu_offline_cpu'
    > > > declared 'static' but never defined
    > >
    > > <red face>
    > >
    > > > it's harmless, but since we are generally trying to fix all warnings
    > > > and gravitate towards more and more -Werror subsystems, it would be
    > > > nice to fix this.
    > >
    > > Indeed, and I have updated my build-output-check script to alert
    > > me to warning messages from my multiple-configuration test runs.
    > > Please see below for patch.
    >
    > btw., you can unset CONFIG_ALLOW_WARNINGS in -tip kernels to turn
    > build warnings into build failures - and those are harder to miss.

    Thank you for the tip!!!

    Thanx, Paul


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