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x86: watchdog - check for CPU is being supported

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This patch does check if CPU is being recongnized
before call the unreserve(). Since enable_lapic_nmi_watchdog()
does have such a check the same is make sense here too
in a sake of code consistency (but nothing more).

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: macro@linux-mips.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Cyrill Gorcunov 2008-06-04 01:00:58 +04:00 committed by Thomas Gleixner
parent 3ed3f06295
commit 1a1b1d1322
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kernel/cpu/perfctr-watchdog.c
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@ -181,7 +181,9 @@ void disable_lapic_nmi_watchdog(void)
return;
on_each_cpu(stop_apic_nmi_watchdog, NULL, 0, 1);
wd_ops->unreserve();
if (wd_ops)
wd_ops->unreserve();
BUG_ON(atomic_read(&nmi_active) != 0);
}