Index: x11/nvidia-driver/Makefile
--- x11/nvidia-driver/Makefile	2013-03-09 07:11:03.000000000 -0800
+++ x11/nvidia-driver/Makefile	2013-03-09 06:48:18.000000000 -0800
@@ -86,6 +86,10 @@
 
 PLIST_SUB+=	LINUXBASE=${LINUXBASE} SHLIB_VERSION=${PORTVERSION} \
 		MODULESDIR=${MODULESDIR}
+. if ${OSVERSION} > 1000028
+EXTRA_PATCHES+=	${FILESDIR}/r248084-patch-src-nv-freebsd.h
+EXTRA_PATCHES+=	${FILESDIR}/r248084-patch-src-nvidia_subr.c
+. endif
 
 .if ${PORT_OPTIONS:MLINUX}
 CONFLICTS=	linux[-_]dri-[0-9]* linux-f10-dri-[0-9]*
Index: x11/nvidia-driver/files/r248084-patch-src-nv-freebsd.h
--- x11/nvidia-driver/files/r248084-patch-src-nv-freebsd.h	1969-12-31 16:00:00.000000000 -0800
+++ x11/nvidia-driver/files/r248084-patch-src-nv-freebsd.h	2013-03-09 06:39:54.000000000 -0800
@@ -0,0 +1,10 @@
+--- src/nv-freebsd.h.orig	2013-01-14 14:38:44.000000000 -0800
++++ src/nv-freebsd.h	2013-03-09 06:36:23.000000000 -0800
+@@ -77,6 +77,7 @@
+ #include <vm/vm_object.h>
+ #include <vm/pmap.h>
+ #include <vm/vm_map.h>
++#include <sys/rwlock.h>
+ #include <vm/vm_pager.h>
+ #include <vm/uma.h>
+ 
Index: x11/nvidia-driver/files/r248084-patch-src-nvidia_subr.c
--- x11/nvidia-driver/files/r248084-patch-src-nvidia_subr.c	1969-12-31 16:00:00.000000000 -0800
+++ x11/nvidia-driver/files/r248084-patch-src-nvidia_subr.c	2013-03-09 06:48:53.000000000 -0800
@@ -0,0 +1,56 @@
+--- src/nvidia_subr.c.orig	2013-01-14 14:38:44.000000000 -0800
++++ src/nvidia_subr.c	2013-03-09 06:47:05.000000000 -0800
+@@ -83,7 +83,7 @@
+             if (!sc->BAR_objects[i])
+                 goto failed;
+ 
+-            VM_OBJECT_LOCK(sc->BAR_objects[i]);
++            VM_OBJECT_WLOCK(sc->BAR_objects[i]);
+             switch (i) {
+                 case NV_GPU_BAR_INDEX_FB:
+                     vm_object_set_memattr(sc->BAR_objects[i],
+@@ -95,7 +95,7 @@
+                             VM_MEMATTR_UNCACHEABLE);
+                     break;
+             }
+-            VM_OBJECT_UNLOCK(sc->BAR_objects[i]);
++            VM_OBJECT_WUNLOCK(sc->BAR_objects[i]);
+         }
+     }
+ 
+@@ -541,9 +541,9 @@
+                 goto failed;
+             }
+ 
+-            VM_OBJECT_LOCK(sc->UD_object);
++            VM_OBJECT_WLOCK(sc->UD_object);
+             vm_object_set_memattr(sc->UD_object, VM_MEMATTR_UNCACHEABLE);
+-            VM_OBJECT_UNLOCK(sc->UD_object);
++            VM_OBJECT_WUNLOCK(sc->UD_object);
+         }
+ 
+         nv->flags |= NV_FLAG_OPEN;
+@@ -965,9 +965,9 @@
+         goto failed;
+     }
+ 
+-    VM_OBJECT_LOCK(at->object);
++    VM_OBJECT_WLOCK(at->object);
+     vm_object_set_memattr(at->object, attr);
+-    VM_OBJECT_UNLOCK(at->object);
++    VM_OBJECT_WUNLOCK(at->object);
+ 
+     *private = at;
+     SLIST_INSERT_HEAD(&sc->alloc_list, at, list);
+@@ -1108,9 +1108,9 @@
+         goto failed;
+     }
+ 
+-    VM_OBJECT_LOCK(at->object);
++    VM_OBJECT_WLOCK(at->object);
+     vm_object_set_memattr(at->object, attr);
+-    VM_OBJECT_UNLOCK(at->object);
++    VM_OBJECT_WUNLOCK(at->object);
+ 
+     *private = at;
+     SLIST_INSERT_HEAD(&sc->alloc_list, at, list);