Commit 95f19f65 authored by Amit Pundir's avatar Amit Pundir Committed by Rafael J. Wysocki
Browse files

epoll: drop EPOLLWAKEUP if PM_SLEEP is disabled 



Drop EPOLLWAKEUP from epoll events mask if CONFIG_PM_SLEEP is disabled.

Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent dc1ccc48

fs/eventpoll.c

+1 −2
Original line number Diff line number Diff line
@@ -1852,8 +1852,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, 
		goto error_tgt_fput;



	/* Check if EPOLLWAKEUP is allowed */

	if ((epds.events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND))

		epds.events &= ~EPOLLWAKEUP;

	ep_take_care_of_epollwakeup(&epds);



	/*

	 * We have to check that the file structure underneath the file descriptor

include/uapi/linux/eventpoll.h

+12 −1
Original line number Diff line number Diff line
@@ -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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