x86: Use get_desc_base()

[sfrench/cifs-2.6.git] / arch / x86 / kernel / step.c

diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index e8b9863ef8c4f8d09f10344d868450711add7ee5..3149032ff107598e49c1451df9f5964ac81d4f2c 100644 (file)
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -4,6 +4,7 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/ptrace.h>
+#include <asm/desc.h>
 
 unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs)
 {
@@ -23,7 +24,7 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re
         * and APM bios ones we just ignore here.
         */
        if ((seg & SEGMENT_TI_MASK) == SEGMENT_LDT) {
-               u32 *desc;
+               struct desc_struct *desc;
                unsigned long base;
 
                seg &= ~7UL;
@@ -33,12 +34,10 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re
                        addr = -1L; /* bogus selector, access would fault */
                else {
                        desc = child->mm->context.ldt + seg;
-                       base = ((desc[0] >> 16) |
-                               ((desc[1] & 0xff) << 16) |
-                               (desc[1] & 0xff000000));
+                       base = get_desc_base(desc);
 
                        /* 16-bit code segment? */
-                       if (!((desc[1] >> 22) & 1))
+                       if (!desc->d)
                                addr &= 0xffff;
                        addr += base;
                }