Move ep_take_care_of_epollwakeup() to fs/eventpoll.c

This doesn't make any sense to expose to userspace, so it's been moved
to the one user. This was introduced by commit 95f19f658ce1 ("epoll:
drop EPOLLWAKEUP if PM_SLEEP is disabled").

Signed-off-by: Palmer Dabbelt <[e-mail]>
Reviewed-by: Andrew Waterman <[e-mail]>
Reviewed-by: Albert Ou <[e-mail]>
Message-Id: <[e-mail]>
[thuth: Rebased to fix contextual conflicts]
Reviewed-by: Arnd Bergmann <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Thomas Huth <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

fs/eventpoll.c

···
 	return do_epoll_create(0);
 }
 
+#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
+
 static inline int epoll_mutex_lock(struct mutex *mutex, int depth,
 				   bool nonblock)
 {

include/uapi/linux/eventpoll.h

···
 	__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 */