lcd: add SPI-based LCD and backlight driver for SHARP corgi/spitz

[linux-2.6-omap-h63xx.git] / include / linux / tracehook.h

diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index b1875582c1a1466c558f3ef7831e3186bd766be8..6186a789d6c7a2f6d5c3ce7a3651a1db184b67ed 100644 (file)
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -272,7 +272,7 @@ static inline void tracehook_finish_clone(struct task_struct *child,
  * tracehook_report_clone_complete().  This must prevent the child from
  * self-reaping if tracehook_report_clone_complete() uses the @child
  * pointer; otherwise it might have died and been released by the time
- * tracehook_report_report_clone_complete() is called.
+ * tracehook_report_clone_complete() is called.
  *
  * Called with no locks held, but the child cannot run until this returns.
  */
@@ -280,7 +280,7 @@ static inline void tracehook_report_clone(int trace, struct pt_regs *regs,
                                          unsigned long clone_flags,
                                          pid_t pid, struct task_struct *child)
 {
-       if (unlikely(trace)) {
+       if (unlikely(trace) || unlikely(clone_flags & CLONE_PTRACE)) {
                /*
                 * The child starts up with an immediate SIGSTOP.
                 */
@@ -487,14 +487,20 @@ static inline int tracehook_notify_jctl(int notify, int why)
        return notify || (current->ptrace & PT_PTRACED);
 }
 
+#define DEATH_REAP                     -1
+#define DEATH_DELAYED_GROUP_LEADER     -2
+
 /**
  * tracehook_notify_death - task is dead, ready to notify parent
  * @task:              @current task now exiting
  * @death_cookie:      value to pass to tracehook_report_death()
  * @group_dead:                nonzero if this was the last thread in the group to die
  *
- * Return the signal number to send our parent with do_notify_parent(), or
- * zero to send no signal and leave a zombie, or -1 to self-reap right now.
+ * A return value >= 0 means call do_notify_parent() with that signal
+ * number.  Negative return value can be %DEATH_REAP to self-reap right
+ * now, or %DEATH_DELAYED_GROUP_LEADER to a zombie without notifying our
+ * parent.  Note that a return value of 0 means a do_notify_parent() call
+ * that sends no signal, but still wakes up a parent blocked in wait*().
  *
  * Called with write_lock_irq(&tasklist_lock) held.
  */
@@ -502,7 +508,7 @@ static inline int tracehook_notify_death(struct task_struct *task,
                                         void **death_cookie, int group_dead)
 {
        if (task->exit_signal == -1)
-               return task->ptrace ? SIGCHLD : -1;
+               return task->ptrace ? SIGCHLD : DEATH_REAP;
 
        /*
         * If something other than our normal parent is ptracing us, then
@@ -512,21 +518,21 @@ static inline int tracehook_notify_death(struct task_struct *task,
        if (thread_group_empty(task) && !ptrace_reparented(task))
                return task->exit_signal;
 
-       return task->ptrace ? SIGCHLD : 0;
+       return task->ptrace ? SIGCHLD : DEATH_DELAYED_GROUP_LEADER;
 }
 
 /**
  * tracehook_report_death - task is dead and ready to be reaped
  * @task:              @current task now exiting
- * @signal:            signal number sent to parent, or 0 or -1
+ * @signal:            return value from tracheook_notify_death()
  * @death_cookie:      value passed back from tracehook_notify_death()
  * @group_dead:                nonzero if this was the last thread in the group to die
  *
  * Thread has just become a zombie or is about to self-reap.  If positive,
  * @signal is the signal number just sent to the parent (usually %SIGCHLD).
- * If @signal is -1, this thread will self-reap.  If @signal is 0, this is
- * a delayed_group_leader() zombie.  The @death_cookie was passed back by
- * tracehook_notify_death().
+ * If @signal is %DEATH_REAP, this thread will self-reap.  If @signal is
+ * %DEATH_DELAYED_GROUP_LEADER, this is a delayed_group_leader() zombie.
+ * The @death_cookie was passed back by tracehook_notify_death().
  *
  * If normal reaping is not inhibited, @task->exit_state might be changing
  * in parallel.