exec: rework the group exit and fix the race with kill

[linux-2.6-block.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 680bb03a4b9098d07f03afad76ef3b797f0487a2..483ea4e1accf3f4ffba55c76c225966491b5db53 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -555,6 +555,13 @@ struct signal_struct {
 #define SIGNAL_STOP_CONTINUED  0x00000004 /* SIGCONT since WCONTINUED reap */
 #define SIGNAL_GROUP_EXIT      0x00000008 /* group exit in progress */
 
+/* If true, all threads except ->group_exit_task have pending SIGKILL */
+static inline int signal_group_exit(const struct signal_struct *sig)
+{
+       return  (sig->flags & SIGNAL_GROUP_EXIT) ||
+               (sig->group_exit_task != NULL);
+}
+
 /*
  * Some day this will be a full-fledged user tracking system..
  */