[PATCH] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c

When I implemented the DECLARE_PER_CPU(var) macros, I was careful that
people couldn't use "var" in a non-percpu context, by prepending
percpu__.  I never considered that this would allow them to overload
the same name for a per-cpu and a non-percpu variable.

It is only one of many horrors in the i386 boot code, but let's rename
the non-perpcu cpu_gdt_descr to early_gdt_descr (not boot_gdt_descr,
that's something else...)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>

===================================================================

3 files changed, 4 insertions, 5 deletions

diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index b322f72ffaad..3fa7f9389afe 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -319,7 +319,7 @@ is386:	movl $2,%ecx		# set MP
 
         call check_x87
         call setup_pda
-        lgdt cpu_gdt_descr
+        lgdt early_gdt_descr
         lidt idt_descr
         ljmp $(__KERNEL_CS),$1f
 1:      movl $(__KERNEL_DS),%eax        # reload all the segment registers
@@ -375,7 +375,7 @@ ENTRY(setup_pda)
         movl start_pda, %eax
 
         /* slot the PDA address into the GDT */
-        mov cpu_gdt_descr+2, %ecx
+        mov early_gdt_descr+2, %ecx
         mov %ax, (__KERNEL_PDA+0+2)(%ecx)               /* base & 0x0000ffff */
         shr $16, %eax
         mov %al, (__KERNEL_PDA+4+0)(%ecx)               /* base & 0x00ff0000 */
@@ -597,7 +597,7 @@ idt_descr:
 
 # boot GDT descriptor (later on used by CPU#0):
         .word 0                         # 32 bit align gdt_desc.address
-ENTRY(cpu_gdt_descr)
+ENTRY(early_gdt_descr)
         .word GDT_ENTRIES*8-1
         .long cpu_gdt_table
 
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 5a00b07e7194..f46a4d095e6c 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -623,7 +623,6 @@ extern struct {
         unsigned short ss;
 } stack_start;
 extern struct i386_pda *start_pda;
-extern struct Xgt_desc_struct cpu_gdt_descr;
 
 #ifdef CONFIG_NUMA
 
diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h
index f398cc456448..050831f34f71 100644
--- a/include/asm-i386/desc.h
+++ b/include/asm-i386/desc.h
@@ -22,7 +22,7 @@ struct Xgt_desc_struct {
 
 extern struct Xgt_desc_struct idt_descr;
 DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
-
+extern struct Xgt_desc_struct early_gdt_descr;
 
 static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {