x86: nmi_watchdog - introduce nmi_watchdog_active() helper

[linux-2.6-omap-h63xx.git] / include / asm-x86 / nmi.h

diff --git a/include/asm-x86/nmi.h b/include/asm-x86/nmi.h
index 1348e542360f54aed60d954cfdcb0d42f91d23b8..21f8d0202a828ee8f6d1bf14b444e2b340f6cb3d 100644 (file)
--- a/include/asm-x86/nmi.h
+++ b/include/asm-x86/nmi.h
@@ -56,6 +56,19 @@ static inline void localise_nmi_watchdog(void)
        if (nmi_watchdog == NMI_IO_APIC)
                nmi_watchdog = NMI_LOCAL_APIC;
 }
+
+/* check if nmi_watchdog is active (ie was specified at boot) */
+static inline int nmi_watchdog_active(void)
+{
+       /*
+        * actually it should be:
+        *      return (nmi_watchdog == NMI_LOCAL_APIC ||
+        *              nmi_watchdog == NMI_IO_APIC)
+        * but since they are power of two we could use a
+        * cheaper way --cvg
+        */
+       return nmi_watchdog & 0x3;
+}
 #endif
 
 void lapic_watchdog_stop(void);