diff -urpN NVIDIA_kernel-1.0-4363.orig/nv-linux.h NVIDIA_kernel-1.0-4363/nv-linux.h
--- NVIDIA_kernel-1.0-4363.orig/nv-linux.h	2003-04-20 03:57:19.000000000 +0200
+++ NVIDIA_kernel-1.0-4363/nv-linux.h	2003-07-08 07:53:49.000000000 +0200
@@ -186,6 +186,15 @@
     }
 #endif
 
+#if defined(pmd_offset_map)
+#define NV_PMD_OFFSET(address, pg_dir) \
+    pmd_offset_map(pg_dir, address);
+#define NV_PMD_OFFSET_UNMAP 1
+#else
+#define NV_PMD_OFFSET(address, pg_dir) \
+    pmd_offset(pg_dir, address)
+#endif
+
 #define NV_PAGE_ALIGN(addr)             ( ((addr) + PAGE_SIZE - 1) / PAGE_SIZE)
 #define NV_MASK_OFFSET(addr)            ( (addr) & (PAGE_SIZE - 1) )
 
diff -urpN NVIDIA_kernel-1.0-4363.orig/nv.c NVIDIA_kernel-1.0-4363/nv.c
--- NVIDIA_kernel-1.0-4363.orig/nv.c	2003-04-20 03:57:19.000000000 +0200
+++ NVIDIA_kernel-1.0-4363/nv.c	2003-07-08 07:55:09.000000000 +0200
@@ -2191,11 +2191,18 @@ nv_get_phys_address(unsigned long addres
     if (pgd_none(*pg_dir))
         goto failed;
 
-    pg_mid_dir = pmd_offset(pg_dir, address);
-    if (pmd_none(*pg_mid_dir))
+    pg_mid_dir = NV_PMD_OFFSET(pg_dir, address);
+    if (pmd_none(*pg_mid_dir)) {
+#if defined(NV_PMD_OFFSET_UNMAP)
+       pmd_unmap(pg_mid_dir);
+#endif
         goto failed;
+    }
 
     NV_PTE_OFFSET(address, pg_mid_dir, pte);
+#if defined(NV_PMD_OFFSET_UNMAP)
+    pmd_unmap(pg_mid_dir);
+#endif
 
     if (!pte_present(pte))
         goto failed;