From: Shahar S Matityahu <shahar.s.matityahu@xxxxxxxxx>
Allow using wait_event_killable_timeout function in kernel
older then 4.13
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
backport/backport-include/linux/wait.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/backport/backport-include/linux/wait.h b/backport/backport-include/linux/wait.h
index c4b1114e05ed..15a674cfe019 100644
--- a/backport/backport-include/linux/wait.h
+++ b/backport/backport-include/linux/wait.h
@@ -78,6 +78,21 @@ wait_on_bit_timeout(void *word, int bit, unsigned mode, unsigned long timeout)
#if LINUX_VERSION_IS_LESS(4,13,0)
#define wait_queue_entry_t wait_queue_t
+
+#define wait_event_killable_timeout(wq_head, condition, timeout) \
+({ \
+ long __ret = timeout; \
+ might_sleep(); \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_killable_timeout(wq_head, \
+ condition, timeout); \
+ __ret; \
+})
+
+#define __wait_event_killable_timeout(wq_head, condition, timeout) \
+ ___wait_event(wq_head, ___wait_cond_timeout(condition), \
+ TASK_KILLABLE, 0, timeout, \
+ __ret = schedule_timeout(__ret))
#endif
#endif /* __BACKPORT_LINUX_WAIT_H */
--
2.18.0
--
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