From: Alan Cox <alan@linux.intel.com>
Date: Tue, 29 May 2012 12:45:01 +0000 (+0100)
Subject: pty: Fix lock inversion
X-Git-Tag: v3.5-rc1~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3ca8b64b97ef4dc54d7bb0b88bbc01a1fca8cb9;p=pandora-kernel.git

pty: Fix lock inversion

The ptmx_open path takes the tty and devpts locks in the wrong order
because tty_init_dev locks and returns a locked tty.  As far as I can
tell this is actually safe anyway because the tty being returned is new
so nobody can get a reference to lock it at this point.

However we don't even need the devpts lock at this point, it's only held
as a byproduct of the way the locks were pushe down.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed