[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>

diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
index 1d216a9..38fc3d5 100644 (file)
--- a/arch/x86_64/kernel/head.S
+++ b/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 */

diff --git a/include/asm-x86_64/segment.h b/include/asm-x86_64/segment.h
index 44adaf1..d4bed33 100644 (file)
--- a/include/asm-x86_64/segment.h
+++ b/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