--- //depot/vendor/freebsd_7/src/sys/amd64/amd64/mp_machdep.c	2007/11/28 16:37:28
+++ //depot/yahoo/ybsd_7/src/sys/amd64/amd64/mp_machdep.c	2008/02/28 04:37:34
@@ -105,6 +105,8 @@
 /* SMP page table page */
 extern pt_entry_t *SMPpt;
 
+extern int  _udatasel;
+
 struct pcb stoppcbs[MAXCPU];
 
 /* Variables needed for SMP tlb shootdown. */
@@ -576,7 +578,9 @@
 	 */
 
 	load_cr4(rcr4() | CR4_PGE);
-
+	load_ds(_udatasel);
+	load_es(_udatasel);
+	load_fs(_udatasel);
 	mtx_unlock_spin(&ap_boot_mtx);
 
 	/* wait until all the AP's are up */