x86: don't compile vsmp_64 for 32bit

Impact: cleanup

that is only needed when CONFIG_X86_VSMP is defined with 64bit
also remove dead code about PCI, because CONFIG_X86_VSMP depends on PCI
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/include/asm/apic.h

@@ -75,7 +75,14 @@ static inline void default_inquire_remote_apic(int apicid)
 #define setup_secondary_clock setup_secondary_APIC_clock
 #endif
 
+#ifdef CONFIG_X86_VSMP
 extern int is_vsmp_box(void);
+#else
+static inline int is_vsmp_box(void)
+{
+	return 0;
+}
+#endif
 extern void xapic_wait_icr_idle(void);
 extern u32 safe_xapic_wait_icr_idle(void);
 extern void xapic_icr_write(u32, u32);

arch/x86/include/asm/setup.h

@@ -64,7 +64,11 @@ extern void x86_quirk_time_init(void);
 #include <asm/bootparam.h>
 
 /* Interrupt control for vSMPowered x86_64 systems */
+#ifdef CONFIG_X86_VSMP
 void vsmp_init(void);
+#else
+static inline void vsmp_init(void) { }
+#endif
 
 void setup_bios_corruption_check(void);
 

arch/x86/kernel/Makefile

@@ -70,7 +70,7 @@ obj-$(CONFIG_FUNCTION_GRAPH_TRACER)	+= ftrace.o
 obj-$(CONFIG_KEXEC)		+= machine_kexec_$(BITS).o
 obj-$(CONFIG_KEXEC)		+= relocate_kernel_$(BITS).o crash.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash_dump_$(BITS).o
-obj-y				+= vsmp_64.o
+obj-$(CONFIG_X86_VSMP)		+= vsmp_64.o
 obj-$(CONFIG_KPROBES)		+= kprobes.o
 obj-$(CONFIG_MODULES)		+= module_$(BITS).o
 obj-$(CONFIG_EFI) 		+= efi.o efi_$(BITS).o efi_stub_$(BITS).o

arch/x86/kernel/setup.c

@@ -863,9 +863,7 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_initrd();
 
-#ifdef CONFIG_X86_64
 	vsmp_init();
-#endif
 
 	io_delay_init();
 

arch/x86/kernel/vsmp_64.c

@@ -22,7 +22,7 @@
 #include <asm/paravirt.h>
 #include <asm/setup.h>
 
-#if defined CONFIG_PCI && defined CONFIG_PARAVIRT
+#ifdef CONFIG_PARAVIRT
 /*
  * Interrupt control on vSMPowered systems:
  * ~AC is a shadow of IF.  If IF is 'on' AC should be 'off'
@@ -114,7 +114,6 @@ static void __init set_vsmp_pv_ops(void)
 }
 #endif
 
-#ifdef CONFIG_PCI
 static int is_vsmp = -1;
 
 static void __init detect_vsmp_box(void)
@@ -139,15 +138,6 @@ int is_vsmp_box(void)
 		return 0;
 	}
 }
-#else
-static void __init detect_vsmp_box(void)
-{
-}
-int is_vsmp_box(void)
-{
-	return 0;
-}
-#endif
 
 void __init vsmp_init(void)
 {