1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 383319bae3f7..09094361dce5 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -46,6 +46,7 @@
 #include <linux/sched.h>
 #include <linux/sched/sysctl.h>
 #include <linux/sched/rt.h>
+#include <linux/sched/deadline.h>
 #include <linux/timer.h>
 #include <linux/freezer.h>
 
@@ -1610,7 +1611,7 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
         unsigned long slack;
 
         slack = current->timer_slack_ns;
-        if (rt_task(current))
+        if (dl_task(current) || rt_task(current))
                 slack = 0;
 
         hrtimer_init_on_stack(&t.timer, clockid, mode);