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x86: APIC/UP: Downgrade the NMI watchdog for no I/O APIC

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If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip will not be used in the UP configuration, because "noapic" has
been specified or the chip is simply not there.  Downgrade to the local
APIC watchdog to rectify.

The new #ifdef is ugly, I know.  A proper solution is to provide suitable
definitions of smp_found_config, etc. for !CONFIG_X86_IO_APIC in a header.
Likewise the whole if () condition should be moved to a static inline
function.  Such clean-ups are beyond the scope of this change and can be
done once the whole issue of the timer has been sorted out.

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 03:27:49 +01:00 committed by Ingo Molnar
parent 148b508309
commit acae7d906f
2 changed files with 6 additions and 0 deletions
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4
arch/x86/kernel/apic_32.c
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@ -1269,6 +1269,10 @@ int __init APIC_init_uniprocessor(void)
setup_local_APIC();
#ifdef CONFIG_X86_IO_APIC
if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
#endif
localise_nmi_watchdog();
end_local_APIC_setup();
#ifdef CONFIG_X86_IO_APIC
if (smp_found_config)

2
arch/x86/kernel/apic_64.c
View File

@ -954,6 +954,8 @@ int __init APIC_init_uniprocessor(void)
if (!skip_ioapic_setup && nr_ioapics)
enable_IO_APIC();
if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
localise_nmi_watchdog();
end_local_APIC_setup();
if (smp_found_config && !skip_ioapic_setup && nr_ioapics)