[PATCH] x86: add an accessor function for getting the per-CPU gdt

Add an accessor function for getting the per-CPU gdt.  Callee must already
have the CPU.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index a162c0326b4a..74145a33cb0f 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -573,6 +573,7 @@ void __devinit cpu_init(void)
         int cpu = smp_processor_id();
         struct tss_struct * t = &per_cpu(init_tss, cpu);
         struct thread_struct *thread = &current->thread;
+        struct desc_struct *gdt = get_cpu_gdt_table(cpu);
         __u32 stk16_off = (__u32)&per_cpu(cpu_16bit_stack, cpu);
 
         if (cpu_test_and_set(cpu, cpu_initialized)) {
@@ -594,18 +595,16 @@ void __devinit cpu_init(void)
          * Initialize the per-CPU GDT with the boot GDT,
          * and set up the GDT descriptor:
          */
-        memcpy(&per_cpu(cpu_gdt_table, cpu), cpu_gdt_table,
-               GDT_SIZE);
+        memcpy(gdt, cpu_gdt_table, GDT_SIZE);
 
         /* Set up GDT entry for 16bit stack */
-        *(__u64 *)&(per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_ESPFIX_SS]) |=
+        *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |=
                 ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) |
                 ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) |
                 (CPU_16BIT_STACK_SIZE - 1);
 
         cpu_gdt_descr[cpu].size = GDT_SIZE - 1;
-        cpu_gdt_descr[cpu].address =
-            (unsigned long)&per_cpu(cpu_gdt_table, cpu);
+        cpu_gdt_descr[cpu].address = (unsigned long)gdt;
 
         load_gdt(&cpu_gdt_descr[cpu]);
         load_idt(&idt_descr);