2010-11-07 07:41:37

by Rakib Mullick

Subject: [PATCH] x86, hw_nmi: Move backtrace_mask declaration under ARCH_HAS_NMI_WATCHDOG.

backtrace_mask has been used under the code context of
ARCH_HAS_NMI_WATCHDOG. So put it into that context.
We were warned by the following warning:

arch/x86/kernel/apic/hw_nmi.c:21: warning: ?backtrace_mask? defined but not used


Signed-off-by: Rakib Mullick <[email protected]>
---

diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index cefd694..62f6e1e 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -17,15 +17,16 @@
#include <linux/nmi.h>
#include <linux/module.h>

-/* For reliability, we're prepared to waste bits here. */
-static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
-
u64 hw_nmi_get_sample_period(void)
{
return (u64)(cpu_khz) * 1000 * 60;
}

#ifdef ARCH_HAS_NMI_WATCHDOG
+
+/* For reliability, we're prepared to waste bits here. */
+static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
+
void arch_trigger_all_cpu_backtrace(void)
{
int i;

2010-11-08 14:41:38

by Don Zickus

Subject: Re: [PATCH] x86, hw_nmi: Move backtrace_mask declaration under ARCH_HAS_NMI_WATCHDOG.

On Sun, Nov 07, 2010 at 01:41:34PM +0600, Rakib Mullick wrote:
> backtrace_mask has been used under the code context of
> ARCH_HAS_NMI_WATCHDOG. So put it into that context.
> We were warned by the following warning:
>
> arch/x86/kernel/apic/hw_nmi.c:21: warning: ‘backtrace_mask’ defined but not used

Thanks, I'll pull that into my tree.

Cheers,
Don

>
>
> Signed-off-by: Rakib Mullick <[email protected]>
> ---
>
> diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
> index cefd694..62f6e1e 100644
> --- a/arch/x86/kernel/apic/hw_nmi.c
> +++ b/arch/x86/kernel/apic/hw_nmi.c
> @@ -17,15 +17,16 @@
> #include <linux/nmi.h>
> #include <linux/module.h>
>
> -/* For reliability, we're prepared to waste bits here. */
> -static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
> -
> u64 hw_nmi_get_sample_period(void)
> {
> return (u64)(cpu_khz) * 1000 * 60;
> }
>
> #ifdef ARCH_HAS_NMI_WATCHDOG
> +
> +/* For reliability, we're prepared to waste bits here. */
> +static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
> +
> void arch_trigger_all_cpu_backtrace(void)
> {
> int i;
> --
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