1 files changed, 36 insertions, 0 deletions

diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index 15cab1a4f84e..5a62915f47a8 100644
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -343,6 +343,18 @@ int __sched out_of_line_wait_on_bit(void *word, int bit,
 }
 EXPORT_SYMBOL(out_of_line_wait_on_bit);
 
+int __sched out_of_line_wait_on_bit_timeout(
+        void *word, int bit, wait_bit_action_f *action,
+        unsigned mode, unsigned long timeout)
+{
+        wait_queue_head_t *wq = bit_waitqueue(word, bit);
+        DEFINE_WAIT_BIT(wait, word, bit);
+
+        wait.key.timeout = jiffies + timeout;
+        return __wait_on_bit(wq, &wait, action, mode);
+}
+EXPORT_SYMBOL_GPL(out_of_line_wait_on_bit_timeout);
+
 int __sched
 __wait_on_bit_lock(wait_queue_head_t *wq, struct wait_bit_queue *q,
                         wait_bit_action_f *action, unsigned mode)
@@ -520,3 +532,27 @@ __sched int bit_wait_io(struct wait_bit_key *word)
         return 0;
 }
 EXPORT_SYMBOL(bit_wait_io);
+
+__sched int bit_wait_timeout(struct wait_bit_key *word)
+{
+        unsigned long now = ACCESS_ONCE(jiffies);
+        if (signal_pending_state(current->state, current))
+                return 1;
+        if (time_after_eq(now, word->timeout))
+                return -EAGAIN;
+        schedule_timeout(word->timeout - now);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(bit_wait_timeout);
+
+__sched int bit_wait_io_timeout(struct wait_bit_key *word)
+{
+        unsigned long now = ACCESS_ONCE(jiffies);
+        if (signal_pending_state(current->state, current))
+                return 1;
+        if (time_after_eq(now, word->timeout))
+                return -EAGAIN;
+        io_schedule_timeout(word->timeout - now);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(bit_wait_io_timeout);