1 files changed, 4 insertions, 1 deletions

diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index fd7eaf7866e0..d3db03f4085d 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -468,8 +468,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                   for(i=0; i<4; i++)
                                           if ((0x5f54 >> ((data >> (16 + 4*i)) & 0xf)) & 1)
                                                   goto out_tsk;
+                                  if (data)
+                                          set_tsk_thread_flag(child, TIF_DEBUG);
+                                  else
+                                          clear_tsk_thread_flag(child, TIF_DEBUG);
                           }
-
                           addr -= (long) &dummy->u_debugreg;
                           addr = addr >> 2;
                           child->thread.debugreg[addr] = data;