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x86: NMI watchdog: Downgrade helper

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A downgrade helper for the NMI watchdog to be used in all places where
the I/O APIC watchdog may have been requested, but the I/O APIC is found
not to be there or meant to be left disabled.  This is so that the
reconfiguration is cosistent and defined in a single place only.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Maciej W. Rozycki 2008-06-06 03:27:41 +01:00 committed by Ingo Molnar
parent 6fe9fe8756
commit 148b508309
1 changed files with 5 additions and 0 deletions
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5
include/asm-x86/nmi.h
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@ -78,6 +78,11 @@ extern int unknown_nmi_panic;
void __trigger_all_cpu_backtrace(void);
#define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
static inline void localise_nmi_watchdog(void)
{
if (nmi_watchdog == NMI_IO_APIC)
nmi_watchdog = NMI_LOCAL_APIC;
}
#endif
void lapic_watchdog_stop(void);