From 95f19f658ce177387345b51bd48fed7b9cd7d4e8 Mon Sep 17 00:00:00 2001
From: Amit Pundir <amit.pundir@linaro.org>
Date: Fri, 15 Nov 2013 12:56:31 +0530
Subject: epoll: drop EPOLLWAKEUP if PM_SLEEP is disabled

Drop EPOLLWAKEUP from epoll events mask if CONFIG_PM_SLEEP is disabled.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/uapi/linux/eventpoll.h | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'include')

diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index 2c267bcbb85c..bc81fb2e1f0e 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -61,5 +61,16 @@ struct epoll_event {
 	__u64 data;
 } EPOLL_PACKED;
 
-
+#ifdef CONFIG_PM_SLEEP
+static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
+{
+	if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND))
+		epev->events &= ~EPOLLWAKEUP;
+}
+#else
+static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
+{
+	epev->events &= ~EPOLLWAKEUP;
+}
+#endif
 #endif /* _UAPI_LINUX_EVENTPOLL_H */
-- 
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