linux-kernel - [PATCH 2/4] Move ep_take_care_of_epollwakeup() to fs/eventpoll.c

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Message-Id: <20230217202301.436895-3-thuth@redhat.com>
Date:   Fri, 17 Feb 2023 21:22:59 +0100
From:   Thomas Huth <thuth@...hat.com>
To:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Cc:     linux-arch@...r.kernel.org, Chas Williams <3chas3@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-atm-general@...ts.sourceforge.net, netdev@...r.kernel.org,
        Andrew Waterman <waterman@...s.berkeley.edu>,
        Albert Ou <aou@...s.berkeley.edu>
Subject: [PATCH 2/4] Move ep_take_care_of_epollwakeup() to fs/eventpoll.c

From: Palmer Dabbelt <palmer@...belt.com>

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 <palmer@...belt.com>
Reviewed-by: Andrew Waterman <waterman@...s.berkeley.edu>
Reviewed-by: Albert Ou <aou@...s.berkeley.edu>
Message-Id: <1447119071-19392-7-git-send-email-palmer@...belt.com>
[thuth: Rebased to fix contextual conflicts]
Signed-off-by: Thomas Huth <thuth@...hat.com>
---
 fs/eventpoll.c                 | 13 +++++++++++++
 include/uapi/linux/eventpoll.h | 12 ------------
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 64659b110973..e2a5d2cc9051 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -2042,6 +2042,19 @@ SYSCALL_DEFINE1(epoll_create, int, size)
 	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)
 {
diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index e687658843b1..cfbcc4cc49ac 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -85,16 +85,4 @@ 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 */
-- 
2.31.1