x86: let setup_arch call init_apic_mappings for 32bit

instead of calling it from trap_init()

also move init ioapic mapping out of apic_32.c

so 32 bit do same as 64 bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 34 insertions, 38 deletions

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index b5571fb0f77e..8fbad8ed0ebe 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -1197,36 +1197,6 @@ void __init init_apic_mappings(void)
         if (boot_cpu_physical_apicid == -1U)
                 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
 
-#ifdef CONFIG_X86_IO_APIC
-        {
-                unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
-                int i;
-
-                for (i = 0; i < nr_ioapics; i++) {
-                        if (smp_found_config) {
-                                ioapic_phys = mp_ioapics[i].mp_apicaddr;
-                                if (!ioapic_phys) {
-                                        printk(KERN_ERR
-                                               "WARNING: bogus zero IO-APIC "
-                                               "address found in MPTABLE, "
-                                               "disabling IO/APIC support!\n");
-                                        smp_found_config = 0;
-                                        skip_ioapic_setup = 1;
-                                        goto fake_ioapic_page;
-                                }
-                        } else {
-fake_ioapic_page:
-                                ioapic_phys = (unsigned long)
-                                              alloc_bootmem_pages(PAGE_SIZE);
-                                ioapic_phys = __pa(ioapic_phys);
-                        }
-                        set_fixmap_nocache(idx, ioapic_phys);
-                        printk(KERN_DEBUG "mapped IOAPIC to %08lx (%08lx)\n",
-                               __fix_to_virt(idx), ioapic_phys);
-                        idx++;
-                }
-        }
-#endif
 }
 
 /*
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index d6af301c822b..337ec3438a8f 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -25,6 +25,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
+#include <linux/bootmem.h>
 #include <linux/mc146818rtc.h>
 #include <linux/compiler.h>
 #include <linux/acpi.h>
@@ -2852,3 +2853,34 @@ static int __init parse_noapic(char *arg)
         return 0;
 }
 early_param("noapic", parse_noapic);
+
+void __init ioapic_init_mappings(void)
+{
+        unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
+        int i;
+
+        for (i = 0; i < nr_ioapics; i++) {
+                if (smp_found_config) {
+                        ioapic_phys = mp_ioapics[i].mp_apicaddr;
+                        if (!ioapic_phys) {
+                                printk(KERN_ERR
+                                       "WARNING: bogus zero IO-APIC "
+                                       "address found in MPTABLE, "
+                                       "disabling IO/APIC support!\n");
+                                smp_found_config = 0;
+                                skip_ioapic_setup = 1;
+                                goto fake_ioapic_page;
+                        }
+                } else {
+fake_ioapic_page:
+                        ioapic_phys = (unsigned long)
+                                      alloc_bootmem_pages(PAGE_SIZE);
+                        ioapic_phys = __pa(ioapic_phys);
+                }
+                set_fixmap_nocache(idx, ioapic_phys);
+                printk(KERN_DEBUG "mapped IOAPIC to %08lx (%08lx)\n",
+                       __fix_to_virt(idx), ioapic_phys);
+                idx++;
+        }
+}
+
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index bf528b23750a..4716460607b4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -766,16 +766,14 @@ void __init setup_arch(char **cmdline_p)
                 get_smp_config();
 #endif
 
-#ifdef CONFIG_X86_64
         init_apic_mappings();
         ioapic_init_mappings();
-#else
-# if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
+
+#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) && defined(CONFIG_X86_32)
         if (def_to_bigsmp)
                 printk(KERN_WARNING "More than 8 CPUs detected and "
                         "CONFIG_X86_PC cannot handle it.\nUse "
                         "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
-# endif
 #endif
         kvm_guest_init();
 
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index dc7c05e5cfe7..f60feee83253 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -1198,10 +1198,6 @@ void __init trap_init(void)
         early_iounmap(p, 4);
 #endif
 
-#ifdef CONFIG_X86_LOCAL_APIC
-        init_apic_mappings();
-#endif
-        set_trap_gate(0,  &divide_error);
         set_intr_gate(1,  &debug);
         set_intr_gate(2,  &nmi);
         set_system_intr_gate(3, &int3); /* int3/4 can be called from all */