More than two boolean arguments to a function are rather confusing and
error-prone for callers.  Let's make the behavior bit flags instead of
triple combos.

A nice suggestion by Borislav Petkov.
Acked-by: NBorislav Petkov <bp@suse.de>
Acked-by: NPrarit Bhargava <prarit@redhat.com>
Acked-by: NMing Lei <ming.lei@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>