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Message-ID: <YRwOQtvOW02QFVow@lorien.usersys.redhat.com>
Date:   Tue, 17 Aug 2021 15:30:10 -0400
From:   Phil Auld <pauld@...hat.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Valentin Schneider <valentin.schneider@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        rcu@...r.kernel.org, linux-rt-users@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Steven Price <steven.price@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Mike Galbraith <efault@....de>
Subject: Re: [PATCH v3 2/4] sched: Introduce migratable()

On Tue, Aug 17, 2021 at 07:09:25PM +0200 Sebastian Andrzej Siewior wrote:
> On 2021-08-11 21:13:52 [+0100], Valentin Schneider wrote:
> > diff --git a/include/linux/sched.h b/include/linux/sched.h
> > index debc960f41e3..8ba7b4a7ee69 100644
> > --- a/include/linux/sched.h
> > +++ b/include/linux/sched.h
> > @@ -1715,6 +1715,16 @@ static inline bool is_percpu_thread(void)
> >  #endif
> >  }
> >  
> > +/* Is the current task guaranteed to stay on its current CPU? */
> > +static inline bool migratable(void)
> 
> I'm going to rename this in my tree to `is_migratable' because of

It's better anyway. See is_percpu_thread() 5 lines above :)


> |security/keys/trusted-keys/trusted_core.c:45:22: error: ‘migratable’ redeclared as different kind of symbol
> |   45 | static unsigned char migratable;
> |      |                      ^~~~~~~~~~
> |In file included from arch/arm64/include/asm/compat.h:16,
> |                 from arch/arm64/include/asm/stat.h:13,
> |                 from include/linux/stat.h:6,
> |                 from include/linux/sysfs.h:22,
> |                 from include/linux/kobject.h:20,
> |                 from include/linux/of.h:17,
> |                 from include/linux/irqdomain.h:35,
> |                 from include/linux/acpi.h:13,
> |                 from include/linux/tpm.h:21,
> |                 from include/keys/trusted-type.h:12,
> |                 from security/keys/trusted-keys/trusted_core.c:10:
> |include/linux/sched.h:1719:20: note: previous definition of ‘migratable’ was here
> | 1719 | static inline bool migratable(void)
> |      |                    ^~~~~~~~~~
> 
> Sebastian
> 

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