1 files changed, 19 insertions, 3 deletions

diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 5b96f038367f..67d297dc1003 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -22,6 +22,8 @@
 #include <asm/nmi.h>
 #include <asm/hw_irq.h>
 #include <asm/apic.h>
+#include <asm/kdebug.h>
+
 #include <mach_ipi.h>
 
 
@@ -93,16 +95,25 @@ static void crash_save_self(struct pt_regs *regs)
 #if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
 static atomic_t waiting_for_crash_ipi;
 
-static int crash_nmi_callback(struct pt_regs *regs, int cpu)
+static int crash_nmi_callback(struct notifier_block *self,
+                        unsigned long val, void *data)
 {
+        struct pt_regs *regs;
         struct pt_regs fixed_regs;
+        int cpu;
+
+        if (val != DIE_NMI_IPI)
+                return NOTIFY_OK;
+
+        regs = ((struct die_args *)data)->regs;
+        cpu = raw_smp_processor_id();
 
         /* Don't do anything if this handler is invoked on crashing cpu.
          * Otherwise, system will completely hang. Crashing cpu can get
          * an NMI if system was initially booted with nmi_watchdog parameter.
          */
         if (cpu == crashing_cpu)
-                return 1;
+                return NOTIFY_STOP;
         local_irq_disable();
 
         if (!user_mode_vm(regs)) {
@@ -125,13 +136,18 @@ static void smp_send_nmi_allbutself(void)
         send_IPI_allbutself(NMI_VECTOR);
 }
 
+static struct notifier_block crash_nmi_nb = {
+        .notifier_call = crash_nmi_callback,
+};
+
 static void nmi_shootdown_cpus(void)
 {
         unsigned long msecs;
 
         atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
         /* Would it be better to replace the trap vector here? */
-        set_nmi_callback(crash_nmi_callback);
+        if (register_die_notifier(&crash_nmi_nb))
+                return;         /* return what? */
         /* Ensure the new callback function is set before sending
          * out the NMI
          */