Revert "i386: move apic init in init_IRQs"

Commit f2b36db692 causes a bootup hang on
at least one machine.  Revert for now until we understand why.  The old
code may be ugly, but it works.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-i386/apic.h

@@ -118,8 +118,7 @@ extern void release_lapic_nmi(void);
 extern void disable_timer_nmi_watchdog(void);
 extern void enable_timer_nmi_watchdog(void);
 extern void nmi_watchdog_tick (struct pt_regs * regs);
-extern int APIC_init(void);
-extern void APIC_late_time_init(void);
+extern int APIC_init_uniprocessor (void);
 extern void disable_APIC_timer(void);
 extern void enable_APIC_timer(void);
 

include/asm-i386/hw_irq.h

@@ -55,7 +55,6 @@ void init_8259A(int aeoi);
 void FASTCALL(send_IPI_self(int vector));
 void init_VISWS_APIC_irqs(void);
 void setup_IO_APIC(void);
-void IO_APIC_late_time_init(void);
 void disable_IO_APIC(void);
 void print_IO_APIC(void);
 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);

include/asm-i386/mach-default/smpboot_hooks.h

@@ -1,6 +1,11 @@
 /* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
  * which needs to alter them. */
 
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+	io_apic_irqs = 0;
+}
+
 static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
 {
 	CMOS_WRITE(0xa, 0xf);
@@ -27,3 +32,13 @@ static inline void smpboot_restore_warm_reset_vector(void)
 
 	*((volatile long *) phys_to_virt(0x467)) = 0;
 }
+
+static inline void smpboot_setup_io_apic(void)
+{
+	/*
+	 * Here we can be sure that there is an IO-APIC in the system. Let's
+	 * go and set it up:
+	 */
+	if (!skip_ioapic_setup && nr_ioapics)
+		setup_IO_APIC();
+}

include/asm-i386/mach-visws/smpboot_hooks.h

@@ -11,7 +11,14 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
 
 /* for visws do nothing for any of these */
 
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+}
+
 static inline void smpboot_restore_warm_reset_vector(void)
 {
 }
 
+static inline void smpboot_setup_io_apic(void)
+{
+}