On Wed, Mar 21, 2018 at 08:32:31AM +0100, Christoph Hellwig wrote: > 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. Do we have a manpage for this new syscall and maybe a test program for it so we can exercise it as part of the kselftests? And do we really need a compat thunk for a new syscall? Ugh, I guess it's needed due to the long mess, right? No way to just define it the same way for both arch sizes? Anyway, the code seems sane to me: Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
