epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready

Browse source

When an epoll_event, that has the EPOLLWAKEUP flag set, is ready, a
wakeup_source will be active to prevent suspend. This can be used to
handle wakeup events from a driver that support poll, e.g. input, if
that driver wakes up the waitqueue passed to epoll before allowing
suspend.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

...

This commit is contained in:

Arve Hjønnevåg 2012-05-01 21:33:34 +02:00 • committed by Rafael J. Wysocki

parent b86ff9820f

commit 4d7e30d989

3 changed files with 103 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

90

fs/eventpoll.c

View file

5

include/linux/capability.h

View file

12

include/linux/eventpoll.h

View file