[PATCH] powerpc: enable PPC_PTRACE_[GS]ETREGS on ppc32

I have tested PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS on umview.

I do not understand why historically these tags has been defined as
PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS instead of simply
PTRACE_[GS]ETREGS. The other "originality" is that the address must be
put into the "addr" field instead of the "data" field as stated in the
manual.
Signed-off-by: renzo davoli <renzo@cs.unibo.it>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/ptrace.c

@@ -404,7 +404,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = ptrace_detach(child, data);
 		break;
 
-#ifdef CONFIG_PPC64
 	case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
 		int i;
 		unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
@@ -468,7 +467,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		}
 		break;
 	}
-#endif /* CONFIG_PPC64 */
 
 #ifdef CONFIG_ALTIVEC
 	case PTRACE_GETVRREGS:

include/asm-powerpc/ptrace.h

@@ -229,13 +229,13 @@ do {									      \
 #define PTRACE_GET_DEBUGREG	25
 #define PTRACE_SET_DEBUGREG	26
 
-#ifdef __powerpc64__
 /* Additional PTRACE requests implemented on PowerPC. */
 #define PPC_PTRACE_GETREGS	0x99	/* Get GPRs 0 - 31 */
 #define PPC_PTRACE_SETREGS	0x98	/* Set GPRs 0 - 31 */
 #define PPC_PTRACE_GETFPREGS	0x97	/* Get FPRs 0 - 31 */
 #define PPC_PTRACE_SETFPREGS	0x96	/* Set FPRs 0 - 31 */
 
+#ifdef __powerpc64__
 /* Calls to trace a 64bit program from a 32bit program */
 #define PPC_PTRACE_PEEKTEXT_3264 0x95
 #define PPC_PTRACE_PEEKDATA_3264 0x94