x86: make APIC_init_uniprocessor() more like smp_prepare_cpus()

Impact: cleanup

1. move localise_nmi_watchdog() later
2. change setup_boot_APIC_clock() to setup_boot_clock() for 64-bit

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 12 deletions

diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index b8616aaa168d..c03f4cc135c7 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -1649,32 +1649,28 @@ int __init APIC_init_uniprocessor(void)
 #ifdef CONFIG_X86_IO_APIC
         /*
          * Now enable IO-APICs, actually call clear_IO_APIC
-         * We need clear_IO_APIC before enabling vector on BP
+         * We need clear_IO_APIC before enabling error vector
          */
         if (!skip_ioapic_setup && nr_ioapics)
                 enable_IO_APIC();
-
-        if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
-                localise_nmi_watchdog();
-#else
-        localise_nmi_watchdog();
 #endif
+
         end_local_APIC_setup();
 
 #ifdef CONFIG_X86_IO_APIC
         if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
                 setup_IO_APIC();
-# ifdef CONFIG_X86_64
-        else
+        else {
                 nr_ioapics = 0;
-# endif
+                localise_nmi_watchdog();
+        }
+#else
+        localise_nmi_watchdog();
 #endif
 
+        setup_boot_clock();
 #ifdef CONFIG_X86_64
-        setup_boot_APIC_clock();
         check_nmi_watchdog();
-#else
-        setup_boot_clock();
 #endif
 
         return 0;