posix_cpu_timer: Convert cputimer->running to bool

[cascardo/linux.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index a4ab9da..6c8504a 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -617,15 +617,15 @@ struct task_cputime_atomic {
 /**
  * struct thread_group_cputimer - thread group interval timer counts
  * @cputime_atomic:    atomic thread group interval timers.
- * @running:           non-zero when there are timers running and
- *                     @cputime receives updates.
+ * @running:           true when there are timers running and
+ *                     @cputime_atomic receives updates.
  *
  * This structure contains the version of task_cputime, above, that is
  * used for thread group CPU timer calculations.
  */
 struct thread_group_cputimer {
        struct task_cputime_atomic cputime_atomic;
-       int running;
+       bool running;
 };
 
 #include <linux/rwsem.h>
@@ -762,6 +762,18 @@ struct signal_struct {
        unsigned audit_tty_log_passwd;
        struct tty_audit_buf *tty_audit_buf;
 #endif
+#ifdef CONFIG_CGROUPS
+       /*
+        * group_rwsem prevents new tasks from entering the threadgroup and
+        * member tasks from exiting,a more specifically, setting of
+        * PF_EXITING.  fork and exit paths are protected with this rwsem
+        * using threadgroup_change_begin/end().  Users which require
+        * threadgroup to remain stable should use threadgroup_[un]lock()
+        * which also takes care of exec path.  Currently, cgroup is the
+        * only user.
+        */
+       struct rw_semaphore group_rwsem;
+#endif
 
        oom_flags_t oom_flags;
        short oom_score_adj;            /* OOM kill score adjustment */