[POWERPC] powerpc: ptrace can set DABR on both 32 and 64 bits

Allow ptrace to set dabr in the thread structure for both 32 and 64 bits,
though only 64 bits actually uses that field, it's actually defined in both.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/ptrace.c

@@ -286,7 +286,6 @@ static void clear_single_step(struct task_struct *task)
 	clear_tsk_thread_flag(task, TIF_SINGLESTEP);
 }
 
-#ifdef CONFIG_PPC64
 static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
 			       unsigned long data)
 {
@@ -305,7 +304,6 @@ static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
 	task->thread.dabr = data;
 	return 0;
 }
-#endif
 
 /*
  * Called by kernel/ptrace.c when detaching..
@@ -503,7 +501,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 	}
 
-#ifdef CONFIG_PPC64
 	case PTRACE_GET_DEBUGREG: {
 		ret = -EINVAL;
 		/* We only support one DABR and no IABRS at the moment */
@@ -517,7 +514,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	case PTRACE_SET_DEBUGREG:
 		ret = ptrace_set_debugreg(child, addr, data);
 		break;
-#endif
 
 	case PTRACE_DETACH:
 		ret = ptrace_detach(child, data);