1 files changed, 5 insertions, 22 deletions

diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index f003062..e591f72b 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -55,23 +55,6 @@
 #endif
 
 /*
- * Get the address of the live pt_regs for the specified task.
- * These are saved onto the top kernel stack when the process
- * is not running.
- *
- * Note: if a user thread is execve'd from kernel space, the
- * kernel stack will not be empty on entry to the kernel, so
- * ptracing these tasks will fail.
- */
-static inline struct pt_regs *
-get_user_regs(struct task_struct *task)
-{
-	return (struct pt_regs *)
-		((unsigned long)task->thread_info + THREAD_SIZE -
-				 8 - sizeof(struct pt_regs));
-}
-
-/*
  * this routine will get a word off of the processes privileged stack.
  * the offset is how far from the base addr as stored in the THREAD.
  * this routine assumes that all the privileged stacks are in our
@@ -79,7 +62,7 @@ get_user_regs(struct task_struct *task)
  */
 static inline long get_user_reg(struct task_struct *task, int offset)
 {
-	return get_user_regs(task)->uregs[offset];
+	return task_pt_regs(task)->uregs[offset];
 }
 
 /*
@@ -91,7 +74,7 @@ static inline long get_user_reg(struct task_struct *task, int offset)
 static inline int
 put_user_reg(struct task_struct *task, int offset, long data)
 {
-	struct pt_regs newregs, *regs = get_user_regs(task);
+	struct pt_regs newregs, *regs = task_pt_regs(task);
 	int ret = -EINVAL;
 
 	newregs = *regs;
@@ -421,7 +404,7 @@ void ptrace_set_bpt(struct task_struct *child)
 	u32 insn;
 	int res;
 
-	regs = get_user_regs(child);
+	regs = task_pt_regs(child);
 	pc = instruction_pointer(regs);
 
 	if (thumb_mode(regs)) {
@@ -572,7 +555,7 @@ static int ptrace_write_user(struct task_struct *tsk, unsigned long off,
  */
 static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
 {
-	struct pt_regs *regs = get_user_regs(tsk);
+	struct pt_regs *regs = task_pt_regs(tsk);
 
 	return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
 }
@@ -587,7 +570,7 @@ static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
 
 	ret = -EFAULT;
 	if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
-		struct pt_regs *regs = get_user_regs(tsk);
+		struct pt_regs *regs = task_pt_regs(tsk);
 
 		ret = -EINVAL;
 		if (valid_user_regs(&newregs)) {