x86: single_step segment macros

This cleans up the single-step code to use the asm/segment.h macros
for segment selector magic bits, rather than its own constant.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 3 deletions

diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index cb3c8bc2939a..3b70f20f21f9 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -5,8 +5,6 @@
 #include <linux/mm.h>
 #include <linux/ptrace.h>
 
-#define LDT_SEGMENT 4
-
 unsigned long convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs)
 {
         unsigned long addr, seg;
@@ -20,7 +18,7 @@ unsigned long convert_rip_to_linear(struct task_struct *child, struct pt_regs *r
          * TLS segments are used for data, and the PNPBIOS
          * and APM bios ones we just ignore here.
          */
-        if (seg & LDT_SEGMENT) {
+        if ((seg & SEGMENT_TI_MASK) == SEGMENT_LDT) {
                 u32 *desc;
                 unsigned long base;