Add a freezable variant of exclusive wait. This can be useful
in, for example, FUSE when system suspend occurs while FUSE is
blocked on requests (which prevents system suspend.)
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
include/linux/wait.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 327894f022cf..b98cfd094543 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -657,6 +657,20 @@ do { \
__ret; \
})
+#define __wait_event_freezable_killable_exclusive(wq, condition) \
+ ___wait_event(wq, condition, (TASK_KILLABLE|TASK_FREEZABLE), 1, 0, \
+ schedule())
+
+#define wait_event_freezable_killable_exclusive(wq, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_freezable_killable_exclusive(wq, \
+ condition); \
+ __ret; \
+})
+
/**
* wait_event_idle - wait for a condition without contributing to system load
* @wq_head: the waitqueue to wait on
--
2.50.0.rc1.591.g9c95f17f64-goog
