From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 22 May 2019 12:42:26 +0200
Subject: [PATCH] sched/swait: Add swait_event_lock_irq()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.2/older/patches-5.2.9-rt3.tar.xz

The swait_event_lock_irq() is inspired by wait_event_lock_irq().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 include/linux/swait.h |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/include/linux/swait.h
+++ b/include/linux/swait.h
@@ -297,4 +297,18 @@ do {									\
 	__ret;								\
 })
 
+#define __swait_event_lock_irq(wq, condition, lock, cmd)		\
+	___swait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0,		\
+		       raw_spin_unlock_irq(&lock);			\
+		       cmd;						\
+		       schedule();					\
+		       raw_spin_lock_irq(&lock))
+
+#define swait_event_lock_irq(wq_head, condition, lock)			\
+	do {								\
+		if (condition)						\
+			break;						\
+		__swait_event_lock_irq(wq_head, condition, lock, );	\
+	} while (0)
+
 #endif /* _LINUX_SWAIT_H */