1 files changed, 4 insertions, 8 deletions

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 8d2549335304..6c358b333166 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -64,8 +64,7 @@ int ptrace_getregs (struct task_struct *child, __s64 __user *data)
         if (!access_ok(VERIFY_WRITE, data, 38 * 8))
                 return -EIO;
 
-        regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-               THREAD_SIZE - 32 - sizeof(struct pt_regs));
+        regs = task_pt_regs(child);
 
         for (i = 0; i < 32; i++)
                 __put_user (regs->regs[i], data + i);
@@ -92,8 +91,7 @@ int ptrace_setregs (struct task_struct *child, __s64 __user *data)
         if (!access_ok(VERIFY_READ, data, 38 * 8))
                 return -EIO;
 
-        regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-               THREAD_SIZE - 32 - sizeof(struct pt_regs));
+        regs = task_pt_regs(child);
 
         for (i = 0; i < 32; i++)
                 __get_user (regs->regs[i], data + i);
@@ -198,8 +196,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 struct pt_regs *regs;
                 unsigned long tmp = 0;
 
-                regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-                       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+                regs = task_pt_regs(child);
                 ret = 0;  /* Default return value. */
 
                 switch (addr) {
@@ -314,8 +311,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
         case PTRACE_POKEUSR: {
                 struct pt_regs *regs;
                 ret = 0;
-                regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-                       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+                regs = task_pt_regs(child);
 
                 switch (addr) {
                 case 0 ... 31: