diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2017-05-10 17:19:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-18 17:59:06 +0300 |
| commit | f4660cc994e12bae60d6f49895636fba662ce0a1 (patch) | |
| tree | 1b2772f70601a954a790e19f75333dc993163ecd /include | |
| parent | ff35eb23de9be50fbe3405f35244b5e82eadc5fa (diff) | |
| download | linux-f4660cc994e12bae60d6f49895636fba662ce0a1.tar.xz | |
vhost/vsock: use static minor number
Vhost-vsock is a software device so there is no probe call that causes
the driver to register its misc char device node. This creates a
chicken and egg problem: userspace applications must open
/dev/vhost-vsock to use the driver but the file doesn't exist until the
kernel module has been loaded.
Use the devname modalias mechanism so that /dev/vhost-vsock is created
at boot. The vhost_vsock kernel module is automatically loaded when the
first application opens /dev/host-vsock.
Note that the "reserved for local use" range in
Documentation/admin-guide/devices.txt is incorrect. The userio driver
already occupies part of that range. I've updated the documentation
accordingly.
Cc: device@lanana.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/miscdevice.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h index 762b5fec3383..58751eae5f77 100644 --- a/include/linux/miscdevice.h +++ b/include/linux/miscdevice.h @@ -54,6 +54,7 @@ #define VHOST_NET_MINOR 238 #define UHID_MINOR 239 #define USERIO_MINOR 240 +#define VHOST_VSOCK_MINOR 241 #define MISC_DYNAMIC_MINOR 255 struct device; |