vfio: Split virqfd into a separate module for vfio bus drivers

An unintended consequence of commit 42ac9bd18d4f ("vfio: initialize
the virqfd workqueue in VFIO generic code") is that the vfio module
is renamed to vfio_core so that it can include both vfio and virqfd.
That's a user visible change that may break module loading scritps
and it imposes eventfd support as a dependency on the core vfio code,
which it's really not.  virqfd is intended to be provided as a service
to vfio bus drivers, so instead of wrapping it into vfio.ko, we can
make it a stand-alone module toggled by vfio bus drivers.  This has
the additional benefit of removing initialization and exit from the
core vfio code.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 683b5146022e..cbed15f194e0 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -142,8 +142,6 @@ struct virqfd {
         struct virqfd           **pvirqfd;
 };
 
-extern int vfio_virqfd_init(void);
-extern void vfio_virqfd_exit(void);
 extern int vfio_virqfd_enable(void *opaque,
                               int (*handler)(void *, void *),
                               void (*thread)(void *, void *),