PTRACE_PEEKDATA consolidation

Identical implementations of PTRACE_PEEKDATA go into generic_ptrace_peekdata()
function.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index cdba9fd..01a3a09 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -128,10 +128,7 @@
 	/* when I and D space are separate, these will need to be fixed. */
 	case PTRACE_PEEKTEXT:	/* read word at location addr. */
 	case PTRACE_PEEKDATA:
-		i = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
-		if (i != sizeof(tmp))
-			goto out_eio;
-		ret = put_user(tmp, (unsigned long *)data);
+		ret = generic_ptrace_peekdata(child, addr, data);
 		break;
 
 	/* read the word at location addr in the USER area. */