kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

[PATCH] x86_64: Remove unused segments

Browse source 
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>
This commit is contained in:
Andi Kleen 2006-01-11 22:46:24 +01:00 committed by Linus Torvalds
parent af5b980424
commit cdc4b9c019
2 changed files with 3 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
arch/x86_64/kernel/head.S
View file

@ -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 */

4
include/asm-x86_64/segment.h
View file

@ -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