From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH 2/4] chardev: Increment cdev reference count when i_cdev
 references it
Date: Tue, 4 Nov 2014 14:46:11 +0000
Message-ID: <20141104144611.GE7996@ZenIV.linux.org.uk>
References: <1414008853-13200-1-git-send-email-jack@suse.cz>
 <1414008853-13200-3-git-send-email-jack@suse.cz>
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Cc: hch@lst.de, linux-fsdevel@vger.kernel.org,
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To: Jan Kara <jack@suse.cz>
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On Wed, Oct 22, 2014 at 10:14:11PM +0200, Jan Kara wrote:
> Currently i_cdev reference to a character device isn't accounted in the
> reference count of the character device. This then requires us to track
> all references through a list of all inodes referencing a character
> device which is somewhat clumsy and requires list_head in each inode in
> the system.
> 
> So make i_cdev a reference like any other.

So no rmmod for you until an inode of character device node you had
closed a while ago finally gets evicted from icache?  Or am I misreading
you?