[PATCH] check_process_timers: fix possible lockup

[safe/jmp/linux-2.6] / kernel / posix-cpu-timers.c

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 520f6c5..9d9169a 100644 (file)
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1173,6 +1173,9 @@ static void check_process_timers(struct task_struct *tsk,
                }
                t = tsk;
                do {
+                       if (unlikely(t->flags & PF_EXITING))
+                               continue;
+
                        ticks = cputime_add(cputime_add(t->utime, t->stime),
                                            prof_left);
                        if (!cputime_eq(prof_expires, cputime_zero) &&
@@ -1193,11 +1196,7 @@ static void check_process_timers(struct task_struct *tsk,
                                              t->it_sched_expires > sched)) {
                                t->it_sched_expires = sched;
                        }
-
-                       do {
-                               t = next_thread(t);
-                       } while (unlikely(t->flags & PF_EXITING));
-               } while (t != tsk);
+               } while ((t = next_thread(t)) != tsk);
        }
 }