At system boot time, the NMI watchdog no longer reserved its MSRs,
allowing other subsystems to mess with them. Fix that.
Signed-off-by: Björn Steinbrink <[EMAIL PROTECTED]>
---
diff --git a/arch/i386/kernel/cpu/perfctr-watchdog.c
b/arch/i386/kernel/cpu/perfctr-watchdog.c
index 2b04c8f..f0b6763 100644
--- a/arch/i386/kernel/cpu/perfctr-watchdog.c
+++ b/arch/i386/kernel/cpu/perfctr-watchdog.c
@@ -614,6 +614,12 @@ int lapic_watchdog_init(unsigned nmi_hz)
probe_nmi_watchdog();
if (!wd_ops)
return -1;
+
+ if (!wd_ops->reserve()) {
+ printk(KERN_ERR
+ "NMI watchdog: cannot reserve perfctrs\n");
+ return -1;
+ }
}
if (!(wd_ops->setup(nmi_hz))) {
-
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