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-rw-r--r--include/linux/init_task.h1
-rw-r--r--include/linux/prctl.h7
-rw-r--r--include/linux/sched.h6
3 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 021d8e720c7..23fd8909b9e 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -170,6 +170,7 @@ extern struct group_info init_groups;
.cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
.fs_excl = ATOMIC_INIT(0), \
.pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
+ .timer_slack_ns = 50000, /* 50 usec default slack */ \
.pids = { \
[PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
diff --git a/include/linux/prctl.h b/include/linux/prctl.h
index 5ad79198d6f..48d887e3c6e 100644
--- a/include/linux/prctl.h
+++ b/include/linux/prctl.h
@@ -78,4 +78,11 @@
#define PR_GET_SECUREBITS 27
#define PR_SET_SECUREBITS 28
+/*
+ * Get/set the timerslack as used by poll/select/nanosleep
+ * A value of 0 means "use default"
+ */
+#define PR_SET_TIMERSLACK 29
+#define PR_GET_TIMERSLACK 30
+
#endif /* _LINUX_PRCTL_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3d9120c5ad1..dcc03fd5a7f 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1301,6 +1301,12 @@ struct task_struct {
int latency_record_count;
struct latency_record latency_record[LT_SAVECOUNT];
#endif
+ /*
+ * time slack values; these are used to round up poll() and
+ * select() etc timeout values. These are in nanoseconds.
+ */
+ unsigned long timer_slack_ns;
+ unsigned long default_timer_slack_ns;
};
/*