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authorVivek Goyal <vgoyal@in.ibm.com>2007-05-02 19:27:07 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:07 +0200
commit30f472895401fbe8e64f861a2569bc9acb098741 (patch)
tree121c0836f9327125e14e1b54d7a82da722efa6a5 /include/asm-x86_64
parent278c0eb7f96586c02b2bfaa8e250d951919a2e6a (diff)
[PATCH] x86-64: cleanup segments
Move __KERNEL32_CS up into the unused gdt entry. __KERNEL32_CS is used when entering the kernel so putting it first is useful when trying to keep boot gdt sizes to a minimum. Set the accessed bit on all gdt entries. We don't care so there is no need for the cpu to burn the extra cycles, and it potentially allows the pages to be immutable. Plus it is confusing when debugging and your gdt entries mysteriously change. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/segment.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-x86_64/segment.h b/include/asm-x86_64/segment.h
index 334ddcdd8f9..adf2bf1e187 100644
--- a/include/asm-x86_64/segment.h
+++ b/include/asm-x86_64/segment.h
@@ -6,7 +6,7 @@
#define __KERNEL_CS 0x10
#define __KERNEL_DS 0x18
-#define __KERNEL32_CS 0x38
+#define __KERNEL32_CS 0x08
/*
* we cannot use the same code segment descriptor for user and kernel