x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit.

tj: moved cpu_number definition out of CONFIG_HAVE_SETUP_PER_CPU_AREA
    for voyager.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

5 files changed, 10 insertions, 7 deletions

diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index 5b821fbdaf7b..cae6697c0991 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -53,7 +53,6 @@ int main(void)
         ENTRY(oldrsp); 
         ENTRY(pcurrent); 
         ENTRY(irqcount);
-        ENTRY(cpunumber);
         DEFINE(pda_size, sizeof(struct x8664_pda));
         BLANK();
 #undef ENTRY
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index b6d7eec0be77..4221e920886d 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -899,7 +899,6 @@ void __cpuinit pda_init(int cpu)
 
         load_pda_offset(cpu);
 
-        pda->cpunumber = cpu;
         pda->irqcount = -1;
         pda->kernelstack = (unsigned long)stack_thread_info() -
                                  PDA_STACKOFFSET + THREAD_SIZE;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 77d546817d94..2c00a57ccb90 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -66,9 +66,6 @@ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
 DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
 EXPORT_PER_CPU_SYMBOL(current_task);
 
-DEFINE_PER_CPU(int, cpu_number);
-EXPORT_PER_CPU_SYMBOL(cpu_number);
-
 /*
  * Return saved PC of a blocked thread.
  */
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 8b53ef83c611..258497f93f4d 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -22,6 +22,15 @@
 # define DBG(x...)
 #endif
 
+/*
+ * Could be inside CONFIG_HAVE_SETUP_PER_CPU_AREA with other stuff but
+ * voyager wants cpu_number too.
+ */
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(int, cpu_number);
+EXPORT_PER_CPU_SYMBOL(cpu_number);
+#endif
+
 #ifdef CONFIG_X86_LOCAL_APIC
 unsigned int num_processors;
 unsigned disabled_cpus __cpuinitdata;
@@ -193,6 +202,7 @@ void __init setup_per_cpu_areas(void)
                 memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start);
                 per_cpu_offset(cpu) = ptr - __per_cpu_start;
                 per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
+                per_cpu(cpu_number, cpu) = cpu;
 #ifdef CONFIG_X86_64
                 per_cpu(irq_stack_ptr, cpu) =
                         (char *)per_cpu(irq_stack, cpu) + IRQ_STACK_SIZE - 64;
diff --git a/arch/x86/kernel/smpcommon.c b/arch/x86/kernel/smpcommon.c
index 7e157810062f..add36b4e37c9 100644
--- a/arch/x86/kernel/smpcommon.c
+++ b/arch/x86/kernel/smpcommon.c
@@ -28,7 +28,5 @@ __cpuinit void init_gdt(int cpu)
 
         write_gdt_entry(get_cpu_gdt_table(cpu),
                         GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S);
-
-        per_cpu(cpu_number, cpu) = cpu;
 }
 #endif