Christoph Hellwig 7a074e96de aio: implement io_pgetevents
This is the io_getevents equivalent of ppoll/pselect and allows to
properly mix signals and aio completions (especially with IOCB_CMD_POLL)
and atomically executes the following sequence:

	sigset_t origmask;

	pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
	ret = io_getevents(ctx, min_nr, nr, events, timeout);
	pthread_sigmask(SIG_SETMASK, &origmask, NULL);

Note that unlike many other signal related calls we do not pass a sigmask
size, as that would get us to 7 arguments, which aren't easily supported
by the syscall infrastructure.  It seems a lot less painful to just add a
new syscall variant in the unlikely case we're going to increase the
sigset size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-02 19:57:24 +02:00
..
2018-04-11 10:28:38 -07:00
2018-04-27 16:13:31 -07:00
2018-04-27 16:13:31 -07:00
2018-04-10 09:58:58 -04:00
2018-04-06 18:31:06 -07:00
2018-04-20 08:25:31 -07:00
2018-04-11 10:28:39 -07:00
2018-04-11 16:02:18 -07:00
2018-04-15 12:27:58 -07:00
2018-04-15 17:21:30 -07:00
2018-05-02 19:57:24 +02:00
2018-04-11 10:28:38 -07:00