1 files changed, 1 insertions, 0 deletions

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 3f8918782e0c..00f803246948 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1573,6 +1573,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
 
               case PTRACE_DETACH:
                 /* detach a process that was attached. */
+                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
                 ret = ptrace_detach(child, data);
                 goto out_tsk;