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Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/core.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3636b80222ac..21b548b69455 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4091,6 +4091,22 @@ static inline void finish_lock_switch(struct rq *rq)
# define finish_arch_post_lock_switch() do { } while (0)
#endif
+static inline void kmap_local_sched_out(void)
+{
+#ifdef CONFIG_KMAP_LOCAL
+ if (unlikely(current->kmap_ctrl.idx))
+ __kmap_local_sched_out();
+#endif
+}
+
+static inline void kmap_local_sched_in(void)
+{
+#ifdef CONFIG_KMAP_LOCAL
+ if (unlikely(current->kmap_ctrl.idx))
+ __kmap_local_sched_in();
+#endif
+}
+
/**
* prepare_task_switch - prepare to switch tasks
* @rq: the runqueue preparing to switch
@@ -4113,6 +4129,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev,
perf_event_task_sched_out(prev, next);
rseq_preempt(prev);
fire_sched_out_preempt_notifiers(prev, next);
+ kmap_local_sched_out();
prepare_task(next);
prepare_arch_switch(next);
}
@@ -4179,6 +4196,14 @@ static struct rq *finish_task_switch(struct task_struct *prev)
finish_lock_switch(rq);
finish_arch_post_lock_switch();
kcov_finish_switch(current);
+ /*
+ * kmap_local_sched_out() is invoked with rq::lock held and
+ * interrupts disabled. There is no requirement for that, but the
+ * sched out code does not have an interrupt enabled section.
+ * Restoring the maps on sched in does not require interrupts being
+ * disabled either.
+ */
+ kmap_local_sched_in();
fire_sched_in_preempt_notifiers(current);
/*