[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>

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

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
 

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
 

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)
 {