Remove _cpu_pda()

pda->dataoffset = cpu_pda(cpu) - __per_cpu_start

We could now setup

__per_cpu_offset[i] = cpu_pda(cpu) - __per_cpu_start

Thus

cpu_pda(cpu) = __per_cpu_offset[i] + __per_cpu_start

---

 arch/x86/kernel/head64.c  |    2 +-
 arch/x86/kernel/setup64.c |    3 ---
 include/asm-x86/pda.h     |    2 +-
 3 files changed, 2 insertions(+), 5 deletions(-)

Index: linux-2.6.24-rc3-mm2/arch/x86/kernel/head64.c
===================================================================
--- linux-2.6.24-rc3-mm2.orig/arch/x86/kernel/head64.c	2007-11-28 17:21:32.504440349 -0800
+++ linux-2.6.24-rc3-mm2/arch/x86/kernel/head64.c	2007-11-28 17:23:01.620940300 -0800
@@ -71,7 +71,7 @@ void __init x86_64_start_kernel(char * r
 	early_printk("Kernel alive\n");
 
  	for (i = 0; i < NR_CPUS; i++)
- 		cpu_pda(i) = &boot_cpu_pda[i];
+ 		__per_cpu_offset[i] = ((char *)&boot_cpu_pda[i]) - __per_cpu_start;
 
 	pda_init(0);
 	copy_bootdata(__va(real_mode_data));
Index: linux-2.6.24-rc3-mm2/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6.24-rc3-mm2.orig/arch/x86/kernel/setup64.c	2007-11-28 17:21:32.504440349 -0800
+++ linux-2.6.24-rc3-mm2/arch/x86/kernel/setup64.c	2007-11-28 17:23:01.624939787 -0800
@@ -28,9 +28,6 @@ struct boot_params __initdata boot_param
 
 cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
 
-struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly;
-EXPORT_SYMBOL(_cpu_pda);
-
 DEFINE_PER_CPU_FIRST(struct x8664_pda, pda);
 EXPORT_PER_CPU_SYMBOL(pda);
 
Index: linux-2.6.24-rc3-mm2/include/asm-x86/pda.h
===================================================================
--- linux-2.6.24-rc3-mm2.orig/include/asm-x86/pda.h	2007-11-28 17:22:21.282002897 -0800
+++ linux-2.6.24-rc3-mm2/include/asm-x86/pda.h	2007-11-28 17:23:45.384465744 -0800
@@ -41,7 +41,7 @@ struct x8664_pda {
 extern struct x8664_pda *_cpu_pda[];
 extern void pda_init(int);
 
-#define cpu_pda(i) (_cpu_pda[i])
+#define cpu_pda(i) ((struct x8664_pda *)(__per_cpu_start + __per_cpu_offset[i]))
 
 /* 
  * There is no fast way to get the base address of the PDA, all the accesses