From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Ryden <markryde@gmail.com>
Subject: /dev/misc/evtchn ,
	/dev/xen/evtchn and the event channel driver : a little question
Date: Thu, 29 Sep 2005 16:53:15 +0300
Message-ID: <dac4506050929065367bb94f3@mail.gmail.com>
Reply-To: Mark Ryden <markryde@gmail.com>
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Hello,
   This is something I do not understand : I have a version of
xen-unstable from
a few days ago. (I am using the default "make world"  and make
install, which means 2.6.* versions; and I run it on x386).

 I had looked at the code of evtchn.c (/drivers/xen/evtchn in the sparse tr=
ee).

I see there:

err =3D misc_register(&evtchn_miscdev);
=09if (err !=3D 0)
=09   {
=09   printk(KERN_ALERT "Could not register /dev/misc/evtchn\n");
=09  return err;
         }

and also:
static struct miscdevice evtchn_miscdev =3D {
=09.minor        =3D EVTCHN_MINOR,
=09.name         =3D "evtchn",
=09.fops         =3D &evtchn_fops,
#if LINUX_VERSION_CODE >=3D KERNEL_VERSION(2,6,0)
=09.devfs_name   =3D "misc/evtchn",
#endif
};

I had booted Xen (domain 0).

But I do not have /dev/misc/evtchn !
(as ls /dev/misc/evtchn shows).
On the other hand I *DO* have /dev/xen/evtchn and it seems to me that
other modules in tools use /dev/xen/evtchn and not /dev/misc/evtchn.

What is the truth behind this mystery ?

TIA,
MR