--- linux/arch/i386/kernel/msr.c	2004-05-19 18:25:09.000000000 +0200
+++ linux-2.6.5/arch/i386/kernel/msr.c	2004-04-04 05:36:57.000000000 +0200
@@ -241,7 +241,7 @@
   int cpu = iminor(file->f_dentry->d_inode);
   struct cpuinfo_x86 *c = &(cpu_data)[cpu];
   
-  if (cpu >= num_possible_cpus() || !cpu_online(cpu))
+  if (!cpu_online(cpu))
     return -ENXIO;		/* No such CPU */
   if ( !cpu_has(c, X86_FEATURE_MSR) )
     return -EIO;		/* MSR not supported */