linux-kernel - Re: linux-next: Tree for December 10 (x86 nmi

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Date:	Mon, 13 Dec 2010 07:55:09 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Don Zickus <dzickus@...hat.com>
CC:	Rakib Mullick <rakib.mullick@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Subject: Re: linux-next: Tree for December 10 (x86 nmi_watchdog)

On 12/13/10 07:37, Don Zickus wrote:
> On Sun, Dec 12, 2010 at 11:27:02AM +0600, Rakib Mullick wrote:
>> On Fri, Dec 10, 2010 at 11:25 PM, Randy Dunlap <randy.dunlap@...cle.com> wrote:
>>> On Fri, 10 Dec 2010 13:57:46 +1100 Stephen Rothwell wrote:
>>>
>>>> Hi all,
>>>>
>>>> Changes since 20101209:
>>>
>>>
>>> arch/x86/kernel/apic/hw_nmi.c:28: error: redefinition of 'touch_nmi_watchdog'
>>> include/linux/nmi.h:22: note: previous definition of 'touch_nmi_watchdog' was here
>>>
>> Hello Randy,
>>
>> Please checkout the following patch. Does it work?
> 
> This fixes the problem.  Sorry about that.  I need to remember to try more
> random config options to catch these things.
> ----8<---
> 
> From: Don Zickus <dzickus@...hat.com>
> Date: Mon, 13 Dec 2010 10:31:58 -0500
> Subject: [PATCH] x86, watchdog: Compile fix when CONFIG_LOCAL_APIC not enabled
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> When adjusting the code to handle removing the old nmi watchdog,
> I forgot to consider the compile case when the local apic is not
> enabled.  This small change fixes the compile warning:
> 
> arch/x86/kernel/apic/hw_nmi.c:28:6: error: redefinition of ‘touch_nmi_watchdog’
> 
> Signed-off-by: Don Zickus <dzickus@...hat.com>

Acked-by: Randy Dunlap <randy.dunlap@...cle.com>

Thanks.

> ---
>  arch/x86/kernel/apic/hw_nmi.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
> index c558e11..93da91d 100644
> --- a/arch/x86/kernel/apic/hw_nmi.c
> +++ b/arch/x86/kernel/apic/hw_nmi.c
> @@ -17,6 +17,7 @@
>  #include <linux/nmi.h>
>  #include <linux/module.h>
>  
> +#ifdef ARCH_HAS_NMI_WATCHDOG
>  #ifdef CONFIG_HARDLOCKUP_DETECTOR
>  u64 hw_nmi_get_sample_period(void)
>  {
> @@ -31,6 +32,8 @@ void touch_nmi_watchdog(void)
>  }
>  EXPORT_SYMBOL(touch_nmi_watchdog);
>  #endif
> +#endif
> +
>  #ifdef arch_trigger_all_cpu_backtrace
>  /* For reliability, we're prepared to waste bits here. */
>  static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;


-- 
~Randy
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