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authorStefan Hajnoczi <stefanha@redhat.com>2017-05-10 10:19:18 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-05-18 16:59:06 +0200
commitf4660cc994e12bae60d6f49895636fba662ce0a1 (patch)
tree1b2772f70601a954a790e19f75333dc993163ecd /Documentation
parentff35eb23de9be50fbe3405f35244b5e82eadc5fa (diff)
downloadlinux-f4660cc994e12bae60d6f49895636fba662ce0a1.tar.bz2
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 'Documentation')
-rw-r--r--Documentation/admin-guide/devices.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index c9cea2e39c21..6b71852dadc2 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -369,8 +369,10 @@
237 = /dev/loop-control Loopback control device
238 = /dev/vhost-net Host kernel accelerator for virtio net
239 = /dev/uhid User-space I/O driver support for HID subsystem
+ 240 = /dev/userio Serio driver testing device
+ 241 = /dev/vhost-vsock Host kernel driver for virtio vsock
- 240-254 Reserved for local use
+ 242-254 Reserved for local use
255 Reserved for MISC_DYNAMIC_MINOR
11 char Raw keyboard device (Linux/SPARC only)