--- arch/x86/kernel/traps_32.c  2008-09-22 02:55:41.000000000 +0300
+++ arch/x86/kernel/traps_32.c  2008-09-22 04:32:15.000000000 +0300
@@ -768,7 +768,7 @@
        return 0;
 }
 
-static nmi_callback_t nmi_ipi_callback = dummy_nmi_callback;
+static int (*nmi_ipi_callback)(struct pt_regs * regs, int cpu) = dummy_nmi_callback;
 
 static __kprobes void default_do_nmi(struct pt_regs * regs)
 {
@@ -833,7 +833,7 @@
        nmi_exit();
 }
 
-void set_nmi_ipi_callback(nmi_callback_t callback)
+void set_nmi_ipi_callback(int(*callback)(struct pt_regs * regs, int cpu))
 {
        nmi_ipi_callback = callback;
 }