--- msr-tools-1.1.2/wrmsr.c.orig	2004-07-20 09:54:59.000000000 -0600
+++ msr-tools-1.1.2/wrmsr.c	2011-12-27 14:07:24.505887313 -0700
@@ -90,7 +90,11 @@ int main(int argc, char *argv[])
 
   reg = strtoul(argv[optind++], NULL, 0);
 
+#ifdef SMP
   sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
+#else
+  sprintf(msr_file_name, "/dev/msr%d", cpu);
+#endif
   fd = open(msr_file_name, O_WRONLY);
   if ( fd < 0 ) {
     if ( errno == ENXIO ) {
--- msr-tools-1.1.2/rdmsr.c.orig	2004-07-20 09:54:59.000000000 -0600
+++ msr-tools-1.1.2/rdmsr.c	2011-12-27 14:06:37.831584784 -0700
@@ -167,7 +167,11 @@ int main(int argc, char *argv[])
 
   reg = strtoul(argv[optind], NULL, 0);
 
+#ifdef SMP
   sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
+#else
+  sprintf(msr_file_name, "/dev/msr%d", cpu);
+#endif
   fd = open(msr_file_name, O_RDONLY);
   if ( fd < 0 ) {
     if ( errno == ENXIO ) {