From b50989dc444599c8b21edc23536fc305f4e9b7d5 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sat, 19 Sep 2009 13:13:22 -0700
Subject: [PATCH] tty: make the kref destructor occur asynchronously

We want to be able to sleep in the destructor for USB at least. It isn't a
hot path so just pushing it to a work queue doesn't really cause any
difficulty.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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