x86: use specialized routine for setup per-cpu area

We use the same routing as x86_64, moved now to setup.c.
Just with a few ifdefs inside.
Note that this routing uses prefill_possible_map().
It has the very nice side effect of allowing hotplugging of
cpus that are marked as present but disabled by acpi bios.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 77 deletions

diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c
index e24c45677094..6b4e3262e8cb 100644
--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -85,83 +85,6 @@ static int __init nonx32_setup(char *str)
 }
 __setup("noexec32=", nonx32_setup);
 
-/*
- * Copy data used in early init routines from the initial arrays to the
- * per cpu data areas.  These arrays then become expendable and the
- * *_early_ptr's are zeroed indicating that the static arrays are gone.
- */
-static void __init setup_per_cpu_maps(void)
-{
-        int cpu;
-
-        for_each_possible_cpu(cpu) {
-#ifdef CONFIG_SMP
-                if (per_cpu_offset(cpu)) {
-#endif
-                        per_cpu(x86_cpu_to_apicid, cpu) =
-                                                x86_cpu_to_apicid_init[cpu];
-                        per_cpu(x86_bios_cpu_apicid, cpu) =
-                                                x86_bios_cpu_apicid_init[cpu];
-#ifdef CONFIG_NUMA
-                        per_cpu(x86_cpu_to_node_map, cpu) =
-                                                x86_cpu_to_node_map_init[cpu];
-#endif
-#ifdef CONFIG_SMP
-                }
-                else
-                        printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
-                                                                        cpu);
-#endif
-        }
-
-        /* indicate the early static arrays will soon be gone */
-        x86_cpu_to_apicid_early_ptr = NULL;
-        x86_bios_cpu_apicid_early_ptr = NULL;
-#ifdef CONFIG_NUMA
-        x86_cpu_to_node_map_early_ptr = NULL;
-#endif
-}
-
-/*
- * Great future plan:
- * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
- * Always point %gs to its beginning
- */
-void __init setup_per_cpu_areas(void)
-{ 
-        int i;
-        unsigned long size;
-
-#ifdef CONFIG_HOTPLUG_CPU
-        prefill_possible_map();
-#endif
-
-        /* Copy section for each CPU (we discard the original) */
-        size = PERCPU_ENOUGH_ROOM;
-
-        printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
-        for_each_cpu_mask (i, cpu_possible_map) {
-                char *ptr;
-#ifndef CONFIG_NEED_MULTIPLE_NODES
-                ptr = alloc_bootmem_pages(size);
-#else
-                int node = early_cpu_to_node(i);
-
-                if (!node_online(node) || !NODE_DATA(node))
-                        ptr = alloc_bootmem_pages(size);
-                else
-                        ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
-#endif
-                if (!ptr)
-                        panic("Cannot allocate cpu data for CPU %d\n", i);
-                cpu_pda(i)->data_offset = ptr - __per_cpu_start;
-                memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
-        }
-
-        /* setup percpu data maps early */
-        setup_per_cpu_maps();
-} 
-
 void pda_init(int cpu)
 { 
         struct x8664_pda *pda = cpu_pda(cpu);