1 files changed, 10 insertions, 0 deletions

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 0870523c2ae4..a73ebd3b9d4c 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -453,6 +453,10 @@ struct task_struct *ptrace_get_task_struct(pid_t pid)
         return child;
 }
 
+#ifndef arch_ptrace_attach
+#define arch_ptrace_attach(child)       do { } while (0)
+#endif
+
 #ifndef __ARCH_SYS_PTRACE
 asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 {
@@ -476,6 +480,12 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 
         if (request == PTRACE_ATTACH) {
                 ret = ptrace_attach(child);
+                /*
+                 * Some architectures need to do book-keeping after
+                 * a ptrace attach.
+                 */
+                if (!ret)
+                        arch_ptrace_attach(child);
                 goto out_put_task_struct;
         }