1 files changed, 7 insertions, 26 deletions

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4ec60552150..703100d5e45 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);