From: Peter Hurley <peter@hurleysoftware.com>
Date: Sat, 17 Jan 2015 20:42:04 +0000 (-0500)
Subject: tty: Make lock subclasses available for other tty locks
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~82^2~27
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3abf87cd3e70009ed70a7f28c2914888a7e27332;p=pandora-kernel.git

tty: Make lock subclasses available for other tty locks

Besides nested legacy_mutex locking which is required on pty pair
teardown, other nested pty operations require lock subclassing.

Move lock subclass definition to tty interface header, include/linux/tty.h,
and document its use.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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