1 files changed, 7 insertions, 26 deletions

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4ec605521504..703100d5e458 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -868,11 +868,6 @@ int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
         flush_spe_to_thread(current);
         error = do_execve(filename, (char __user * __user *) a1,
                           (char __user * __user *) a2, regs);
-        if (error == 0) {
-                task_lock(current);
-                current->ptrace &= ~PT_DTRACE;
-                task_unlock(current);
-        }
         putname(filename);
 out:
         return error;
@@ -919,20 +914,6 @@ int validate_sp(unsigned long sp, struct task_struct *p,
         return valid_irq_stack(sp, p, nbytes);
 }
 
-#ifdef CONFIG_PPC64
-#define MIN_STACK_FRAME 112     /* same as STACK_FRAME_OVERHEAD, in fact */
-#define FRAME_LR_SAVE   2
-#define INT_FRAME_SIZE  (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD + 288)
-#define REGS_MARKER     0x7265677368657265ul
-#define FRAME_MARKER    12
-#else
-#define MIN_STACK_FRAME 16
-#define FRAME_LR_SAVE   1
-#define INT_FRAME_SIZE  (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define REGS_MARKER     0x72656773ul
-#define FRAME_MARKER    2
-#endif
-
 EXPORT_SYMBOL(validate_sp);
 
 unsigned long get_wchan(struct task_struct *p)
@@ -944,15 +925,15 @@ unsigned long get_wchan(struct task_struct *p)
                 return 0;
 
         sp = p->thread.ksp;
-        if (!validate_sp(sp, p, MIN_STACK_FRAME))
+        if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
                 return 0;
 
         do {
                 sp = *(unsigned long *)sp;
-                if (!validate_sp(sp, p, MIN_STACK_FRAME))
+                if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
                         return 0;
                 if (count > 0) {
-                        ip = ((unsigned long *)sp)[FRAME_LR_SAVE];
+                        ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE];
                         if (!in_sched_functions(ip))
                                 return ip;
                 }
@@ -981,12 +962,12 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
         lr = 0;
         printk("Call Trace:\n");
         do {
-                if (!validate_sp(sp, tsk, MIN_STACK_FRAME))
+                if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD))
                         return;
 
                 stack = (unsigned long *) sp;
                 newsp = stack[0];
-                ip = stack[FRAME_LR_SAVE];
+                ip = stack[STACK_FRAME_LR_SAVE];
                 if (!firstframe || ip != lr) {
                         printk("["REG"] ["REG"] ", sp, ip);
                         print_symbol("%s", ip);
@@ -1000,8 +981,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
                  * See if this is an exception frame.
                  * We look for the "regshere" marker in the current frame.
                  */
-                if (validate_sp(sp, tsk, INT_FRAME_SIZE)
-                    && stack[FRAME_MARKER] == REGS_MARKER) {
+                if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE)
+                    && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
                         struct pt_regs *regs = (struct pt_regs *)
                                 (sp + STACK_FRAME_OVERHEAD);
                         printk("--- Exception: %lx", regs->trap);