luoqi 81e3a332a9 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>		1999-04-28 01:04:33 +00:00
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linux	Enable vmspace sharing on SMP. Major changes are,	1999-04-28 01:04:33 +00:00
netbsd	Changed inline' to __inline' so that this file can be compiled by	1998-02-03 20:14:35 +00:00
svr4	Suser() simplification:	1999-04-27 11:18:52 +00:00