x86: unify include/asm/ldt_32/64.h

The additional struct member of user_desc can be made conditional for
64 bit compiles.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 39 insertions, 12 deletions

diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
index 3d9cc20d2ba4..20c597242b53 100644
--- a/include/asm-x86/ldt.h
+++ b/include/asm-x86/ldt.h
@@ -1,13 +1,40 @@
-#ifdef __KERNEL__
-# ifdef CONFIG_X86_32
-#  include "ldt_32.h"
-# else
-#  include "ldt_64.h"
-# endif
-#else
-# ifdef __i386__
-#  include "ldt_32.h"
-# else
-#  include "ldt_64.h"
-# endif
+/*
+ * ldt.h
+ *
+ * Definitions of structures used with the modify_ldt system call.
+ */
+#ifndef _ASM_X86_LDT_H
+#define _ASM_X86_LDT_H
+
+/* Maximum number of LDT entries supported. */
+#define LDT_ENTRIES     8192
+/* The size of each LDT entry. */
+#define LDT_ENTRY_SIZE  8
+
+#ifndef __ASSEMBLY__
+/*
+ * Note on 64bit base and limit is ignored and you cannot set DS/ES/CS
+ * not to the default values if you still want to do syscalls. This
+ * call is more for 32bit mode therefore.
+ */
+struct user_desc {
+        unsigned int  entry_number;
+        unsigned int  base_addr;
+        unsigned int  limit;
+        unsigned int  seg_32bit:1;
+        unsigned int  contents:2;
+        unsigned int  read_exec_only:1;
+        unsigned int  limit_in_pages:1;
+        unsigned int  seg_not_present:1;
+        unsigned int  useable:1;
+#ifdef __x86_64__
+        unsigned int  lm:1;
+#endif
+};
+
+#define MODIFY_LDT_CONTENTS_DATA        0
+#define MODIFY_LDT_CONTENTS_STACK       1
+#define MODIFY_LDT_CONTENTS_CODE        2
+
+#endif /* !__ASSEMBLY__ */
 #endif