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authorCyrill Gorcunov <gorcunov@gmail.com>2008-06-04 01:00:58 +0400
committerThomas Gleixner <tglx@linutronix.de>2008-06-05 15:14:14 +0200
commit1a1b1d1322ebd1ece405f3057cdd408bc77e391d (patch)
tree32eec40d8c8280e4f44425f5aa7df5ecd38b810e /arch/x86/kernel/cpu/perfctr-watchdog.c
parent3ed3f06295e69700fa808396f7b350bff2b69de0 (diff)
x86: watchdog - check for CPU is being supported
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>
Diffstat (limited to 'arch/x86/kernel/cpu/perfctr-watchdog.c')
-rw-r--r--arch/x86/kernel/cpu/perfctr-watchdog.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index f9ae93adffe5..ddda4b64f545 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -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);
}