x86: don't set IO APIC features if IO APIC is not enabled

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 21 insertions, 3 deletions

diff --git a/arch/x86/kernel/mpparse_32.c b/arch/x86/kernel/mpparse_32.c
index 4f4cfad9ae57..09cb77813680 100644
--- a/arch/x86/kernel/mpparse_32.c
+++ b/arch/x86/kernel/mpparse_32.c
@@ -221,6 +221,8 @@ static void __init MP_bus_info (struct mpc_config_bus *m)
         }
 }
 
+#ifdef CONFIG_X86_IO_APIC
+
 static int bad_ioapic(unsigned long address)
 {
         if (nr_ioapics >= MAX_IO_APICS) {
@@ -263,6 +265,8 @@ static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
                 panic("Max # of irq sources exceeded!!\n");
 }
 
+#endif
+
 static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
 {
         Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
@@ -421,21 +425,25 @@ static int __init smp_read_mpc(struct mp_config_table *mpc)
                         }
                         case MP_IOAPIC:
                         {
+#ifdef CONFIG_X86_IO_APIC
                                 struct mpc_config_ioapic *m=
                                         (struct mpc_config_ioapic *)mpt;
                                 MP_ioapic_info(m);
                                 mpt+=sizeof(*m);
                                 count+=sizeof(*m);
+#endif
                                 break;
                         }
                         case MP_INTSRC:
                         {
+#ifdef CONFIG_X86_IO_APIC
                                 struct mpc_config_intsrc *m=
                                         (struct mpc_config_intsrc *)mpt;
 
                                 MP_intsrc_info(m);
                                 mpt+=sizeof(*m);
                                 count+=sizeof(*m);
+#endif
                                 break;
                         }
                         case MP_LINTSRC:
@@ -463,6 +471,8 @@ static int __init smp_read_mpc(struct mp_config_table *mpc)
         return num_processors;
 }
 
+#ifdef CONFIG_X86_IO_APIC
+
 static int __init ELCR_trigger(unsigned int irq)
 {
         unsigned int port;
@@ -537,11 +547,15 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)
         MP_intsrc_info(&intsrc);
 }
 
+#endif
+
 static inline void __init construct_default_ISA_mptable(int mpc_default_type)
 {
         struct mpc_config_processor processor;
         struct mpc_config_bus bus;
+#ifdef CONFIG_X86_IO_APIC
         struct mpc_config_ioapic ioapic;
+#endif
         struct mpc_config_lintsrc lintsrc;
         int linttypes[2] = { mp_ExtINT, mp_NMI };
         int i;
@@ -597,6 +611,7 @@ static inline void __init construct_default_ISA_mptable(int mpc_default_type)
                 MP_bus_info(&bus);
         }
 
+#ifdef CONFIG_X86_IO_APIC
         ioapic.mpc_type = MP_IOAPIC;
         ioapic.mpc_apicid = 2;
         ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
@@ -608,7 +623,7 @@ static inline void __init construct_default_ISA_mptable(int mpc_default_type)
          * We set up most of the low 16 IO-APIC pins according to MPS rules.
          */
         construct_default_ioirq_mptable(mpc_default_type);
-
+#endif
         lintsrc.mpc_type = MP_LINTSRC;
         lintsrc.mpc_irqflag = 0;                /* conforming */
         lintsrc.mpc_srcbusid = 0;
@@ -670,6 +685,8 @@ void __init get_smp_config (void)
                         printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
                         return;
                 }
+
+#ifdef CONFIG_X86_IO_APIC
                 /*
                  * If there are no explicit MP IRQ entries, then we are
                  * broken.  We set up most of the low 16 IO-APIC pins to
@@ -687,7 +704,7 @@ void __init get_smp_config (void)
 
                         construct_default_ioirq_mptable(0);
                 }
-
+#endif
         } else
                 BUG();
 
@@ -967,8 +984,9 @@ void __init mp_config_acpi_legacy_irqs (void)
         intsrc.mpc_type = MP_INTSRC;
         intsrc.mpc_irqflag = 0;                                 /* Conforming */
         intsrc.mpc_srcbus = MP_ISA_BUS;
+#ifdef CONFIG_X86_IO_APIC
         intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
-
+#endif
         /* 
          * Use the default configuration for the IRQs 0-15.  Unless
          * overridden by (MADT) interrupt source override entries.