[PATCH 1/2] eventpoll.h: fix epoll event masks

Greg KH
2017-02-23T17:46:38Z

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

When userspace tries to use these defines, it complains that it needs to
be an unsigned 1 that is shifted, so libc implementations have to create
their own version. Fix this by defining it properly so that libcs can
just use the kernel uapi header.

Reported-by: Elliott Hughes <enh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/uapi/linux/eventpoll.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -27,7 +27,7 @@
#define EPOLL_CTL_MOD 3

/* Set exclusive wakeup mode for the target file descriptor */
-#define EPOLLEXCLUSIVE (1 << 28)
+#define EPOLLEXCLUSIVE (1U << 28)

/*
* Request the handling of system wakeup events so as to prevent system suspends
@@ -39,13 +39,13 @@
*
* Requires CAP_BLOCK_SUSPEND
*/
-#define EPOLLWAKEUP (1 << 29)
+#define EPOLLWAKEUP (1U << 29)

/* Set the One Shot behaviour for the target file descriptor */
-#define EPOLLONESHOT (1 << 30)
+#define EPOLLONESHOT (1U << 30)

/* Set the Edge Triggered behaviour for the target file descriptor */
-#define EPOLLET (1 << 31)
+#define EPOLLET (1U << 31)

/*
* On x86-64 make the 64bit structure have the same alignment as the