From: David Howells <dhowells@redhat.com>
Date: Fri, 3 May 2019 17:30:33 +0000 (+0100)
Subject: Add wait_var_event_interruptible()
X-Git-Tag: v5.2-rc1~28^2~12
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a49294eac27c7159cd8b89a96c3b1a857e37b683;p=linux.git

Add wait_var_event_interruptible()

Add wait_var_event_interruptible() to allow interruptible waits for events.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---

diff --git a/include/linux/wait_bit.h b/include/linux/wait_bit.h
index 2b0072fa5e92..7dec36aecbd9 100644
--- a/include/linux/wait_bit.h
+++ b/include/linux/wait_bit.h
@@ -305,6 +305,19 @@ do {									\
 	__ret;								\
 })
 
+#define __wait_var_event_interruptible(var, condition)			\
+	___wait_var_event(var, condition, TASK_INTERRUPTIBLE, 0, 0,	\
+			  schedule())
+
+#define wait_var_event_interruptible(var, condition)			\
+({									\
+	int __ret = 0;							\
+	might_sleep();							\
+	if (!(condition))						\
+		__ret = __wait_var_event_interruptible(var, condition);	\
+	__ret;								\
+})
+
 /**
  * clear_and_wake_up_bit - clear a bit and wake up anyone waiting on that bit
  *