[PATCH] i386: Don't touch per cpu memory of offline CPUs in touch_nmi_watchdog
authorJan Beulich <jbeulich@novell.com>
Thu, 7 Dec 2006 01:14:09 +0000 (02:14 +0100)
committerAndi Kleen <andi@basil.nowhere.org>
Thu, 7 Dec 2006 01:14:09 +0000 (02:14 +0100)
Just like on x86-64, don't touch foreign CPUs' memory if the watchdog
isn't enabled at all.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
arch/i386/kernel/nmi.c

index 171194ccb7bc480d0dc6cfbfbf06c07514d47d31..f5bc7e1be8016b504a65270a0a6f2d6aafe1e0eb 100644 (file)
@@ -870,14 +870,16 @@ static unsigned int
 
 void touch_nmi_watchdog (void)
 {
-       int i;
+       if (nmi_watchdog > 0) {
+               unsigned cpu;
 
-       /*
-        * Just reset the alert counters, (other CPUs might be
-        * spinning on locks we hold):
-        */
-       for_each_possible_cpu(i)
-               alert_counter[i] = 0;
+               /*
+                * Just reset the alert counters, (other CPUs might be
+                * spinning on locks we hold):
+                */
+               for_each_present_cpu (cpu)
+                       alert_counter[cpu] = 0;
+       }
 
        /*
         * Tickle the softlockup detector too: