x86: Replace cpu_2_logical_apicid[] with early percpu variable

Unlike x86_64, on x86_32, the mapping from cpu to logical apicid
may vary depending on apic in use.  cpu_2_logical_apicid[] array
is used for this mapping.  Replace it with early percpu variable
x86_cpu_to_logical_apicid to make it better aligned with other
mappings.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-5-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 53a85baaecca..df934e46bf53 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -165,9 +165,6 @@ static void unmap_cpu_to_node(int cpu)
 #endif
 
 #ifdef CONFIG_X86_32
-u8 cpu_2_logical_apicid[NR_CPUS] __read_mostly =
-                                        { [0 ... NR_CPUS-1] = BAD_APICID };
-
 static void map_cpu_to_logical_apicid(void)
 {
         int cpu = smp_processor_id();
@@ -177,13 +174,13 @@ static void map_cpu_to_logical_apicid(void)
         if (!node_online(node))
                 node = first_online_node;
 
-        cpu_2_logical_apicid[cpu] = apicid;
+        early_per_cpu(x86_cpu_to_logical_apicid, cpu) = apicid;
         map_cpu_to_node(cpu, node);
 }
 
 void numa_remove_cpu(int cpu)
 {
-        cpu_2_logical_apicid[cpu] = BAD_APICID;
+        early_per_cpu(x86_cpu_to_logical_apicid, cpu) = BAD_APICID;
         unmap_cpu_to_node(cpu);
 }
 #else