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, 1 insertions, 4 deletions

diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index af182d3a7000..06a13d9b69db 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -128,10 +128,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
         case PTRACE_POKETEXT: /* write the word at location addr. */
         case PTRACE_POKEDATA:
-                if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                    == sizeof(data))
-                        break;
-                ret = -EIO;
+                ret = generic_ptrace_pokedata(child, addr, data);
                 goto out;
 
         case PTRACE_POKEUSR: