Merge ../linux-2.6-watchdog-mm

[linux-2.6-omap-h63xx.git] / arch / i386 / kernel / nmi.c

diff --git a/arch/i386/kernel/nmi.c b/arch/i386/kernel/nmi.c
index 0fc4997fb14330d94d429d769867902102c37fe4..eaafe233a5da83f4abbb2c17e670b8a46fa4edaa 100644 (file)
--- a/arch/i386/kernel/nmi.c
+++ b/arch/i386/kernel/nmi.c
@@ -13,7 +13,6 @@
  *  Mikael Pettersson  : PM converted to driver model. Disable/enable API.
  */
 
-#include <linux/config.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
@@ -220,11 +219,11 @@ static int __init check_nmi_watchdog(void)
        int cpu;
 
        /* Enable NMI watchdog for newer systems.
-           Actually it should be safe for most systems before 2004 too except
-          for some IBM systems that corrupt registers when NMI happens
-          during SMM. Unfortunately we don't have more exact information
-          on these and use this coarse check. */
-       if (nmi_watchdog == NMI_DEFAULT && dmi_get_year(DMI_BIOS_DATE) >= 2004)
+          Probably safe on most older systems too, but let's be careful.
+          IBM ThinkPads use INT10 inside SMM and that allows early NMI inside SMM
+          which hangs the system. Disable watchdog for all thinkpads */
+       if (nmi_watchdog == NMI_DEFAULT && dmi_get_year(DMI_BIOS_DATE) >= 2004 &&
+               !dmi_name_in_vendors("ThinkPad"))
                nmi_watchdog = NMI_LOCAL_APIC;
 
        if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT))