linux-kernel - Re: kernel/sched/fair.c:1524:20: warning: ???test_idle_cores??? declared ???static??? but never defined

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Date:   Tue, 3 Mar 2020 10:39:41 +0000
From:   Mel Gorman <mgorman@...e.de>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     open list <linux-kernel@...r.kernel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>, juri.lelli@...hat.com,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        rostedt@...dmis.org, bsegall@...gle.com,
        lkft-triage@...ts.linaro.org, anshuman.khandual@....com
Subject: Re: kernel/sched/fair.c:1524:20: warning: ???test_idle_cores???
 declared ???static??? but never defined

On Tue, Mar 03, 2020 at 02:42:38PM +0530, Naresh Kamboju wrote:
> Linux next-20200303 arm64 build warnings
> Please refer below links for more information.
> 
> make -sk KBUILD_BUILD_USER=TuxBuild -C/linux -j16 ARCH=arm64
> CROSS_COMPILE=aarch64-linux-gnu- HOSTCC=gcc CC="sccache
> aarch64-linux-gnu-gcc" O=build Image
> 
> ../kernel/sched/fair.c:1524:20: warning: ???test_idle_cores??? declared
> ???static??? but never defined [-Wunused-function]
>  1524 | static inline bool test_idle_cores(int cpu, bool def);
>       |                    ^~~~~~~~~~~~~~~
> 

There is a fix posted that addresses this but it has not reached
tip/sched/core. I'll resend the accumulated fixes today and cc you.

-- 
Mel Gorman
SUSE Labs