x86: move prefill_possible_map calling early

call it right after we are done with MADT/mptable handling, instead of
doing that in setup_per_cpu_areas() later on...

this way for_possible_cpu() can be used early.

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

3 files changed, 9 insertions, 10 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f52a6fb90238..cfcfbefee0b9 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -818,6 +818,7 @@ void __init setup_arch(char **cmdline_p)
                 get_smp_config();
 #endif
 
+        prefill_possible_map();
 #ifdef CONFIG_X86_64
         init_cpu_to_node();
 #endif
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 43aca2de624a..5fc310f746fc 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -162,16 +162,6 @@ void __init setup_per_cpu_areas(void)
         char *ptr;
         int cpu;
 
-        /* no processor from mptable or madt */
-        if (!num_processors)
-                num_processors = 1;
-
-#ifdef CONFIG_HOTPLUG_CPU
-        prefill_possible_map();
-#else
-        nr_cpu_ids = num_processors;
-#endif
-
         /* Setup cpu_pda map */
         setup_cpu_pda_map();
 
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 3b19441d78b8..e1200b202ed7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1278,12 +1278,20 @@ __init void prefill_possible_map(void)
         int i;
         int possible;
 
+        /* no processor from mptable or madt */
+        if (!num_processors)
+                num_processors = 1;
+
+#ifdef CONFIG_HOTPLUG_CPU
         if (additional_cpus == -1) {
                 if (disabled_cpus > 0)
                         additional_cpus = disabled_cpus;
                 else
                         additional_cpus = 0;
         }
+#else
+        additional_cpus = 0;
+#endif
         possible = num_processors + additional_cpus;
         if (possible > NR_CPUS)
                 possible = NR_CPUS;