x86: nmi_32.c - add nmi_watchdog_default helper

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: hpa@zytor.com
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 13 insertions, 6 deletions

diff --git a/arch/x86/kernel/nmi_32.c b/arch/x86/kernel/nmi_32.c
index 4437fe1edabc..7714e8478213 100644
--- a/arch/x86/kernel/nmi_32.c
+++ b/arch/x86/kernel/nmi_32.c
@@ -51,6 +51,17 @@ static DEFINE_PER_CPU(short, wd_enabled);
 
 static int endflag __initdata = 0;
 
+/* Run after command line and cpu_init init, but before all other checks */
+void nmi_watchdog_default(void)
+{
+        if (nmi_watchdog != NMI_DEFAULT)
+                return;
+        if (lapic_watchdog_ok())
+                nmi_watchdog = NMI_LOCAL_APIC;
+        else
+                nmi_watchdog = NMI_IO_APIC;
+}
+
 #ifdef CONFIG_SMP
 /* The performance counters used by NMI_LOCAL_APIC don't trigger when
  * the CPU is idle. To make sure the NMI watchdog really ticks on all
@@ -437,12 +448,8 @@ int proc_nmi_enabled(struct ctl_table *table, int write, struct file *file,
                 return -EIO;
         }
 
-        if (nmi_watchdog == NMI_DEFAULT) {
-                if (lapic_watchdog_ok())
-                        nmi_watchdog = NMI_LOCAL_APIC;
-                else
-                        nmi_watchdog = NMI_IO_APIC;
-        }
+        /* if nmi_watchdog is not set yet, then set it */
+        nmi_watchdog_default();
 
         if (nmi_watchdog == NMI_LOCAL_APIC) {
                 if (nmi_watchdog_enabled)