x86, VisWS: turn into generic arch, flip over VISWS to generic arch

this is the big move: flip over VISWS to generic arch support.

From this commit on CONFIG_X86_VISWS is just another (default-disabled)
option that turns on certain quirks - no other complications.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -232,7 +232,7 @@ config SMP
 
 config X86_FIND_SMP_CONFIG
 	def_bool y
-	depends on X86_MPPARSE || X86_VOYAGER || X86_VISWS
+	depends on X86_MPPARSE || X86_VOYAGER
 
 if ACPI
 config X86_MPPARSE
@@ -281,18 +281,6 @@ config X86_VOYAGER
 	  If you do not specifically know you have a Voyager based machine,
 	  say N here, otherwise the kernel you build will not be bootable.
 
-config X86_VISWS
-	bool "SGI 320/540 (Visual Workstation)"
-	depends on X86_32 && PCI
-	help
-	  The SGI Visual Workstation series is an IA32-based workstation
-	  based on SGI systems chips with some legacy PC hardware attached.
-
-	  Say Y here to create a kernel to run on the SGI 320 or 540.
-
-	  A kernel compiled for the Visual Workstation will not run on PCs
-	  and vice versa. See <file:Documentation/sgi-visws.txt> for details.
-
 config X86_GENERICARCH
        bool "Generic architecture"
 	depends on X86_32
@@ -363,6 +351,18 @@ config X86_VSMP
 
 endchoice
 
+config X86_VISWS
+	bool "SGI 320/540 (Visual Workstation)"
+	depends on X86_32 && PCI
+	help
+	  The SGI Visual Workstation series is an IA32-based workstation
+	  based on SGI systems chips with some legacy PC hardware attached.
+
+	  Say Y here to create a kernel to run on the SGI 320 or 540.
+
+	  A kernel compiled for the Visual Workstation will run on general
+	  PCs as well. See <file:Documentation/sgi-visws.txt> for details.
+
 config SCHED_NO_NO_OMIT_FRAME_POINTER
 	def_bool y
 	prompt "Single-depth WCHAN output"

arch/x86/Makefile

@@ -114,8 +114,8 @@ mflags-$(CONFIG_X86_VOYAGER)	:= -Iinclude/asm-x86/mach-voyager
 mcore-$(CONFIG_X86_VOYAGER)	:= arch/x86/mach-voyager/
 
 # VISWS subarch support
-mflags-$(CONFIG_X86_VISWS)	:= -Iinclude/asm-x86/mach-visws
-mcore-$(CONFIG_X86_VISWS)	:= arch/x86/mach-visws/
+#mflags-$(CONFIG_X86_VISWS)	:= -Iinclude/asm-x86/mach-visws
+#mcore-$(CONFIG_X86_VISWS)	:= arch/x86/mach-visws/
 
 # generic subarchitecture
 mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic

arch/x86/kernel/Makefile

@@ -19,6 +19,7 @@ obj-y			:= process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
 obj-y			+= traps_$(BITS).o irq_$(BITS).o
 obj-y			+= time_$(BITS).o ioport.o ldt.o
 obj-y			+= setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
+obj-$(CONFIG_X86_VISWS)	+= setup_visws.o traps_visws.o apic_visws.o
 obj-$(CONFIG_X86_32)	+= probe_roms_32.o
 obj-$(CONFIG_X86_32)	+= sys_i386_32.o i386_ksyms_32.o
 obj-$(CONFIG_X86_64)	+= sys_x86_64.o x8664_ksyms_64.o