diff -ru usr/src/nv/nv.c src.my/src/nv/nv.c
--- usr/src/nv/nv.c	2009-05-13 05:51:13.000000000 +1000
+++ src.my/src/nv/nv.c	2009-07-11 09:27:05.561129110 +1000
@@ -878,7 +878,7 @@
 {
     unsigned int pat1, pat2, i;
     U008 PAT_WC_index;
-
+#if 0
     if (!test_bit(X86_FEATURE_PAT,
             (volatile unsigned long *)&boot_cpu_data.x86_capability))
     {
@@ -886,7 +886,7 @@
             "NVRM: CPU does not support the PAT, falling back to MTRRs.\n");
         return NV_PAT_MODE_DISABLED;
     }
-
+#endif
     NV_READ_PAT_ENTRIES(pat1, pat2);
     PAT_WC_index = 0xf;