PTRACE_POKEDATA consolidation

Identical implementations of PTRACE_POKEDATA go into generic_ptrace_pokedata()
function.

AFAICS, fix bug on xtensa where successful PTRACE_POKEDATA will nevertheless
return EPERM.

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>

1 files changed, 3 insertions, 9 deletions

diff --git a/arch/m32r/kernel/ptrace.c b/arch/m32r/kernel/ptrace.c
index 01a1c9ac8458..57a92ef31a90 100644
--- a/arch/m32r/kernel/ptrace.c
+++ b/arch/m32r/kernel/ptrace.c
@@ -619,15 +619,9 @@ do_ptrace(long request, struct task_struct *child, long addr, long data)
          */
         case PTRACE_POKETEXT:
         case PTRACE_POKEDATA:
-                ret = access_process_vm(child, addr, &data, sizeof(data), 1);
-                if (ret == sizeof(data)) {
-                        ret = 0;
-                        if (request == PTRACE_POKETEXT) {
-                                invalidate_cache();
-                        }
-                } else {
-                        ret = -EIO;
-                }
+                ret = generic_ptrace_pokedata(child, addr, data);
+                if (ret == 0 && request == PTRACE_POKETEXT)
+                        invalidate_cache();
                 break;
 
         /*