x86: print message if nmi_watchdog=2 cannot be enabled
right now if there's no CPU support for nmi_watchdog=2 we'll just
refuse it silently.
print a useful warning.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index 19a3594..b943e10 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -667,8 +667,10 @@
{
if (!wd_ops) {
probe_nmi_watchdog();
- if (!wd_ops)
+ if (!wd_ops) {
+ printk(KERN_INFO "NMI watchdog: CPU not supported\n");
return -1;
+ }
if (!wd_ops->reserve()) {
printk(KERN_ERR