[PATCH] x86_64: Remove unused segments

They used to be used by the reboot code, but not anymore.

Noticed by Jan Beulich

Cc: JBeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/head.S

@@ -386,7 +386,7 @@ gdt:
 	
 ENTRY(cpu_gdt_table)
 	.quad	0x0000000000000000	/* NULL descriptor */
-	.quad	0x008f9a000000ffff	/* __KERNEL_COMPAT32_CS */	
+	.quad	0x0			/* unused */
 	.quad	0x00af9a000000ffff	/* __KERNEL_CS */
 	.quad	0x00cf92000000ffff	/* __KERNEL_DS */
 	.quad	0x00cffa000000ffff	/* __USER32_CS */
@@ -396,8 +396,7 @@ ENTRY(cpu_gdt_table)
 	.quad	0,0			/* TSS */
 	.quad	0,0			/* LDT */
 	.quad   0,0,0			/* three TLS descriptors */ 
-	.quad	0x00009a000000ffff	/* __KERNEL16_CS - 16bit PM for S3 wakeup. */
-					/* base must be patched for real base address. */
+	.quad	0			/* unused */
 gdt_end:	
 	/* asm/segment.h:GDT_ENTRIES must match this */	
 	/* This should be a multiple of the cache line size */

include/asm-x86_64/segment.h

@@ -19,15 +19,13 @@
 #define __USER_DS     0x2b   /* 5*8+3 */ 
 #define __USER_CS     0x33   /* 6*8+3 */ 
 #define __USER32_DS	__USER_DS 
-#define __KERNEL16_CS	(GDT_ENTRY_KERNELCS16 * 8)
-#define __KERNEL_COMPAT32_CS   0x8
 
 #define GDT_ENTRY_TLS 1
 #define GDT_ENTRY_TSS 8	/* needs two entries */
 #define GDT_ENTRY_LDT 10 /* needs two entries */
 #define GDT_ENTRY_TLS_MIN 12
 #define GDT_ENTRY_TLS_MAX 14
-#define GDT_ENTRY_KERNELCS16 15
+/* 15 free */
 
 #define GDT_ENTRY_TLS_ENTRIES 3