[PATCH 98] fix PTRACE_SYSCALL after PTRACE_EVENT_VFORK_DONE stop

[Oleg Nesterov]

This is simple. Now that we report PTRACE_EVENT_VFORK_DONE we should
check it to handle PTRACE_SYSCALL/SINGLESTEP before return to user-mode.

---

 kernel/ptrace.c |    2 ++
 1 file changed, 2 insertions(+)

--- PU/kernel/ptrace.c~98_VFORKDONE_THEN_SYSCALL        2009-10-17 
19:37:45.000000000 +0200
+++ PU/kernel/ptrace.c  2009-10-17 19:46:42.000000000 +0200
@@ -990,6 +990,7 @@ static void do_ptrace_resume(struct utra
                case PTRACE_EVENT_EXEC:
                case PTRACE_EVENT_FORK:
                case PTRACE_EVENT_CLONE:
+               case PTRACE_EVENT_VFORK_DONE:
                        set_syscall_code(context, PTRACE_EVENT_SYSCALL_EXIT);
                        do_ptrace_notify_stop(context, tracee);
                        return;
@@ -1001,6 +1002,7 @@ static void do_ptrace_resume(struct utra
                case PTRACE_EVENT_EXEC:
                case PTRACE_EVENT_FORK:
                case PTRACE_EVENT_CLONE:
+               case PTRACE_EVENT_VFORK_DONE:
                case PTRACE_EVENT_SYSCALL_EXIT:
                        read_lock(&tasklist_lock);
                        if (tracee->sighand)