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>

include/asm-x86/Kbuild

@@ -4,8 +4,6 @@ header-y += boot.h
 header-y += debugreg_32.h
 header-y += debugreg_64.h
 header-y += debugreg.h
-header-y += ldt_32.h
-header-y += ldt_64.h
 header-y += ldt.h
 header-y += msr-index.h
 header-y += prctl.h

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