x86, apic: Slim down stack usage in early_init_lapic_mapping()

As far as I see there is no external poking of mp_lapic_addr in
this procedure which could lead to unpredited changes and
require local storage unit for it. Lets use it plain forward.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20090826171324.GC4548@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 3fc3a6c428da16005b3f5fd24d8f71c464b25936..159740decc41c4e9296208fd06c0912380fb9d90 100644 (file)
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1562,8 +1562,6 @@ no_apic:
 #ifdef CONFIG_X86_64
 void __init early_init_lapic_mapping(void)
 {
-       unsigned long phys_addr;
-
        /*
         * If no local APIC can be found then go out
         * : it means there is no mpatable and MADT
@@ -1571,11 +1569,9 @@ void __init early_init_lapic_mapping(void)
        if (!smp_found_config)
                return;
 
-       phys_addr = mp_lapic_addr;
-
-       set_fixmap_nocache(FIX_APIC_BASE, phys_addr);
+       set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
        apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
-                   APIC_BASE, phys_addr);
+                   APIC_BASE, mp_lapic_addr);
 
        /*
         * Fetch the APIC ID of the BSP in case we have a