From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 3/5] ARM: soft_restart: disable the outer L2 when the last CPU is going down
Date: Wed, 16 Nov 2011 10:20:08 -0800 [thread overview]
Message-ID: <4EC3FED8.7000307@codeaurora.org> (raw)
In-Reply-To: <1321466057-19721-4-git-send-email-will.deacon@arm.com>
On 11/16/11 09:54, Will Deacon wrote:
> diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
> index 577d092..664d351 100644
> --- a/arch/arm/kernel/process.c
> +++ b/arch/arm/kernel/process.c
> @@ -137,6 +137,10 @@ void soft_restart(unsigned long addr)
> local_irq_disable();
> local_fiq_disable();
>
> + /* Disable the L2 if we're the last man standing. */
> + if (num_online_cpus() == 1)
> + outer_disable();
> +
When does this code execute on another cpu? My understanding is that
soft_restart() is only called on one CPU so I would think checking the
number of online cpus isn't necessary.
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
next prev parent reply other threads:[~2011-11-16 18:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 17:54 [PATCH v6 0/5] kexec fixes and soft restart code Will Deacon
2011-11-16 17:54 ` [PATCH v6 1/5] ARM: lib: add call_with_stack function for safely changing stack Will Deacon
2011-11-22 13:42 ` Catalin Marinas
2011-11-16 17:54 ` [PATCH v6 2/5] ARM: reset: implement soft_restart for jumping to a physical address Will Deacon
2011-11-22 13:41 ` Catalin Marinas
2011-11-22 13:54 ` Dave Martin
2011-11-22 14:15 ` Will Deacon
2011-11-16 17:54 ` [PATCH v6 3/5] ARM: soft_restart: disable the outer L2 when the last CPU is going down Will Deacon
2011-11-16 18:20 ` Stephen Boyd [this message]
2011-11-16 18:30 ` Will Deacon
2011-11-16 21:59 ` Stephen Boyd
2011-11-16 17:54 ` [PATCH v6 4/5] ARM: stop: execute platform callback from cpu_stop code Will Deacon
2011-11-16 17:54 ` [PATCH v6 5/5] ARM: kexec: use soft_restart for branching to the reboot buffer Will Deacon
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