From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: linux-kernel@vger.kernel.org, rt@linutronix.de,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH v2] s390/cpum_sf: Remove superfluous SMP function call
Date: Mon, 2 May 2016 12:43:56 +0200 [thread overview]
Message-ID: <20160502104356.GB3974@osiris> (raw)
In-Reply-To: <1462179612-55035-1-git-send-email-anna-maria@linutronix.de>
On Mon, May 02, 2016 at 11:00:12AM +0200, Anna-Maria Gleixner wrote:
> Since commit 3b9d6da67e11 ("cpu/hotplug: Fix rollback during error-out
> in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
> CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
> function calls are no longer required.
>
> Replace smp_call_function_single() with a direct call of
> setup_pmc_cpu(). To keep the calling convention, interrupts are
> explicitly disabled around the call.
>
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: linux-s390@vger.kernel.org
> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
> ---
> Changes in v2:
> - Adapt referenced commit in commit message
>
> arch/s390/kernel/perf_cpum_sf.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Same here: Martin, can you pick this one up, please?
next prev parent reply other threads:[~2016-05-02 10:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-02 9:00 [PATCH v2] s390/cpum_sf: Remove superfluous SMP function call Anna-Maria Gleixner
2016-05-02 10:43 ` Heiko Carstens [this message]
2016-05-03 7:23 ` Martin Schwidefsky
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