1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 6252d2fa2bf3..335c5b932e14 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -214,7 +214,7 @@ out:
         return retval;
 }
 
-void __ptrace_detach(struct task_struct *child, unsigned int data)
+static inline void __ptrace_detach(struct task_struct *child, unsigned int data)
 {
         child->exit_code = data;
         /* .. re-parent .. */
@@ -233,6 +233,7 @@ int ptrace_detach(struct task_struct *child, unsigned int data)
         ptrace_disable(child);
 
         write_lock_irq(&tasklist_lock);
+        /* protect against de_thread()->release_task() */
         if (child->ptrace)
                 __ptrace_detach(child, data);
         write_unlock_irq(&tasklist_lock);