Enable vmspace sharing on SMP. Major changes are,

- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/sys/amd64/include/fpu.h b/sys/amd64/include/fpu.h
index a7608d5..10384c6 100644
--- a/sys/amd64/include/fpu.h
+++ b/sys/amd64/include/fpu.h
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)npx.h	5.3 (Berkeley) 1/18/91
- *	$Id: npx.h,v 1.13 1997/06/22 16:03:50 peter Exp $
+ *	$Id: npx.h,v 1.14 1997/07/20 11:06:44 bde Exp $
  */
 
 /*
@@ -45,6 +45,8 @@
 #ifndef _MACHINE_NPX_H_
 #define	_MACHINE_NPX_H_
 
+#include <machine/globals.h>
+
 /* Environment information of floating point unit */
 struct	env87 {
 	long	en_cw;		/* control word (16bits) */
@@ -135,7 +137,9 @@ struct	save87 {
 #endif
 
 #ifdef KERNEL
+#ifndef npxproc
 extern struct proc *npxproc;
+#endif
 
 int	npxdna __P((void));
 void	npxexit __P((struct proc *p));