linux-kernel - Re: [PATCH 1/2] x86: allow module driver to register idle notifier

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Date:	Mon, 20 Oct 2008 21:57:28 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-acpi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Venki Pallipadi <venkatesh.pallipadi@...el.com>,
	Andy Henroid <andrew.d.henroid@...el.com>,
	Len Brown <len.brown@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/2] x86: allow module driver to register idle notifier

Ingo,
How shall we proceed?
If you take this patch, we can ship a modular i7300_idle driver.
If you do not take this patch, then we'll need to build it into
the kernel and not allow it to un-register.

thanks,
-Len

On Thu, 16 Oct 2008, Len Brown wrote:

> From: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
> 
> needed if the i7300_idle driver is to be a module.
> 
> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
> Signed-off-by: Len Brown <len.brown@...el.com>
> ---
>  arch/x86/kernel/process_64.c |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index e12e0e4..3e3d503 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -62,6 +62,13 @@ void idle_notifier_register(struct notifier_block *n)
>  {
>  	atomic_notifier_chain_register(&idle_notifier, n);
>  }
> +EXPORT_SYMBOL_GPL(idle_notifier_register);
> +
> +void idle_notifier_unregister(struct notifier_block *n)
> +{
> +	atomic_notifier_chain_unregister(&idle_notifier, n);
> +}
> +EXPORT_SYMBOL_GPL(idle_notifier_unregister);
>  
>  void enter_idle(void)
>  {
> -- 
> 1.6.0.2.532.g84ed4c
> 
> 
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